This exact question appeared in UPSC Prelims 2025, directly from our class lecture!

At Sleepy Classes, we don’t just teach, we train you to crack UPSC with confidence, not by chance or luck!
Every lecture, every slide, every test is built with years of UPSC experience, helping you decode what UPSC truly demands.
While others stop at basics, we go the extra mile to bring insights that no one else teaches, because our goal isn’t to make you a student…
It’s to make you a future Ranker.

This topic was not only part of our Foundation Batch 2025, but was repeatedly revised under subsequent initiatives like the Prelims Crash Course and Rapid Revision 2025 , covered thrice during the preparation! 💪

What a proud moment for all of us!

Our student Deepsita Behera (OCS Rank 16) has done it!
With just 2 months of dedicated preparation, she scored an amazing 335 marks in Sociology Optional

Moments like these remind us why we do what we do
Her journey is a beautiful example of how sincerity and consistency always pay off.

So proud of you, Deepsita, you’ve made the whole Sleepy Classes family smile today!

Heartiest Congratulations to Deepsita Behera (OAS, Rank 16)
She scored 335 marks in Sociology, the highest among all optionals in OPSC!

We’re incredibly proud of you, Deepsita. Your success inspires thousands of learners every day. ❤️

She was part of Sociology 2025 Batch

https://youtu.be/fDGuSI5A1ss

Sharing an exact step-by-step approach an aspirant need to follow for UPSC 2027 Exam ; from how to start, what to read, how to connect Paper 1 and Paper 2, to how toppers actually write their answers.

Don't Miss Out!!

UPSC IAS Prelims 2026 | Most Recommended Prelims Strategy
Learn exactly how to start preparing for UPSC Prelims 2026, which books to read, how to make notes, and how to cover Current Affairs, CSAT, and NCERTs effectively from Dr. Manmeet Kaur Ma'am

https://youtu.be/Qk093YpaUQg

Some dreams aren’t built in a day , they’re rebuilt after every setback.

After helping toppers year after year , we have come up again with संभव 4.0
This crash course is for those who refuse to quit!

Join the most comprehensive LIVE crash course for Prelims 2026 .

Its not too late , with our structured and strict schedule we can assure you that getting a rank is not a far fetched dream .

Link - https://sleepyclasses.com/upsc-prelims-2026-crash-course/

🚀 *Hiring: Kashish Mittal IAS: UPSC Mentor Program*

We’re looking for a mentor to join *Kashish Mittal IAS’s UPSC Mentorship Program:* a high-impact initiative guiding serious aspirants through structured strategy, evaluation, and 1:1 mentorship.

If you’ve cleared *UPSC Prelims/ Mains* and are passionate about helping others succeed, we’d love to hear from you.

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Hello Doston

If you any query, question or doubt regarding your UPSC GS prep, whether you are confused regarding resources, study material.
How to balance GS and Optional

Join our workshop and get all your doubts cleared
https://us02web.zoom.us/webinar/register/WN_We0jkGUIRp6x1laA19nQfA

NCERTs are important or not, which NCERT Books to read, Old vs New - Solution of all these doubts has been provided in this video, particularly for UPSC Beginners starting their preparation in 2027,
This Video by Shradha Ma’am brings complete clarity on one of the biggest questions for beginners !

https://youtu.be/BYnLErmOWKA?si=Z2H67F_zahklBMwI

Time kam hai, syllabus zyada? Welcome to the Crash Course club!
Where we turn 'Oh no!' into 'Let's go!'
https://youtu.be/xOyFtqGFI9E?si=j6s_CSqBUnbijT2v

We’re BACK & We’ve Got New Initiatives!

We’re back with something truly Power-Packed
to help you get through UPSC in ONE GO, With 0 Extra PREssure.

After 3 days off screens, with family, food, and laughter..we’re Right Back
Recharged. Focussed. Ready to begin again

And this time, the focus is sharper than ever
Bringing new initiatives > simple, exam-centric, and designed to help you score more marks without throwing more material at you.

We’re starting with mini-series on UPSC’s favourite topics & core concepts across subjects,
along with Prelims-oriented, MCQ-driven practice videos.

All in line with our approach,No Noise, No Clutter, only what truly helps you score high.

Because preparation is about doing the right things, calmly and consistently.

So, let’s start again
With less rush, more direction, same purpose,
and one step closer to the RANK.

See you tonight at 10 PM for the detailed video on this.

Let’s welcome back the Prep Days.
Let’s make every day count.
Let’s win together.

Team Sleepy

Let's solve today's Practice Questions

Q1. Consider the following statements:
1. Quiescence is a temporary and reversible state of dormancy in direct response to adverse environmental conditions.
2. Obligate diapause is a genetically programmed dormancy that occurs at a specific stage in an insect’s life cycle, regardless of external conditions.
3. The Flightless Antarctic midge undergoes only quiescence to survive the extreme Antarctic environment.