The following sentence has been divided into parts. One of them contains an error. Select the part that contains the error from the given options.

Several prominent film stars / have appeared on television / on behalf of awareness / about hand hygiene.

1. have appeared on television

2. about hand hygiene

3. on behalf of awareness

4. Several prominent film stars

Choose the correct option for the following :

One who wastes a lot of money is :

1. frugal

2. recluse

3. prodigal

4. reticent

Select the option that can be used as a one-word substitute for the given group of words.

A person who walks in his/her sleep

1. Somnambulist

2. Exorcist

3. Atheist

4. Ventriloquist