Please, note that when the article the comes before the second item in the subject, it means you are referring to two different persons or things and as such, a plural subject is used.
Examples:

The Principal and English teacher is kind
The Principal and the English teacher are kind

RULE 3:
When two different subjects are linked by the correlative conjunction
Either…or and Neither… nor, the verb agrees with the subject that is closer to it. This is called the rule of proximity (closeness or nearness).

Neither the men nor the boy……. here now (a) are (b) is (c) will (d) would.

Neither Agbor nor his parents….. the meeting now. (a) attended (b) are attending (c) attends (d) has attended

Either Ekaette or you…… to go. (a) was (b) are (c) has (d) is

In my opinion, neither the players nor the coach………………the praise for the result of the match. (a) deserves (b) deserve (c)are deserving (d) is deserving.

Audio from Bar peculiar

Audio from Bar. Peculiar

B
B
👍👍

B
D
💯💯

In order to answer questions like the ones above during the examination, it is simpler and easier to detach the other part that comes before the first part.
For example
(Either Ekaette or) you are to go

RULE 4:
The nouns and the pronouns that come before the relative pronouns: who, what, and that, determine the verb form that follows. That is, if the noun or pronoun is singular, the verb will also be singular and verse versa.
Examples:
The teacher ran from the boy who was smelling.
The teacher ran from the boys who were smelling.
Mr Japhet is one of the teachers who teach in my school
Mr Japhet is the teacher who teaches in my school.

Ahmed is one of the boys who always……….good work. (a) does (b) would do (c) do (d) done

You who……. Convicted, should appeal (a) has been (b) is (c) was (d) are

It is I who………. to blame for the accident. (a) is (b) are (c) am (d) were

RULE 5:
When the phrase "one of" is used, it is usually followed by a plural noun or pronoun and a singular verb.
Examples:

One of my teachers is coming
One of my sisters travels every time

The idea behind these constructions is that you have many teachers and more than one sister but you are talking about the action of one of them.

One of the___ selective marking of errors
(a) School of thought suggests
(b) Schools of thought suggest
(c) School of thought suggested
(d) Schools of thought suggests

D
C
💯💯

D is correct

One of the vice………….. in an interim capacity.
(a) President acts
(b) President act
(c) President acted
(d) Presidents acts

D is correct 💯💯

RULE 6:
When adjectives like: rich, poor, helpless, blind, young, privileged, handicapped etc are used in a sentence with the definite article coming before them, they take the plural verb.
For example:

The rich deserve respect
The poor live in misery

The helpless……………… our sympathy. (a) Require (b) requires (c) does require (d) do requires.