Fill in the blank in the sentence below choosing the most appropriate verb from the options given.
Each of the students ___ responsible for maintaining the school garden.

Correct option is B

The correct option is (b) is.

Explanation:
The subject of the sentence is Each of the students. The pronoun each always takes a singular verb, regardless of the noun that follows it in the of phrase.

Grammatical Rule (English):

• Each, every, either, and neither are singular indefinite pronouns and always take a singular verb.
• The noun in the prepositional phrase (of the students) does not affect the number of the verb — the verb must agree with each, which is singular.
• Structure: Each of + plural noun + singular verb

• (a) were – Plural/past tense verb; incorrect as each requires a singular present tense verb here.
• (c) must – A modal verb; it cannot replace is/are/was/were as the main linking verb in this sentence.
• (d) are – Plural verb; incorrect because each always takes a singular verb.