What are the four basic forms of a verb?

a. tenses, principle parts, moods, and types

b. present, present participle, past, and past principle

c. subjunctive, imperative, interrogative, and declarative

(1) infinitive, (2) past tense, (3) present participle, and (4) past participle.

Hence, the option B.

B.

Explanation:

A verb can be defined as an action word of the subject in a sentence. A verb shows what the subject is doing in a sentence.

For example, I am reading a novel. ['reading' is a verb that reveals the action of the subject 'I' in the sentence].

A verb has four basic forms namely present, past, present participle and past participle.

So, the correct answer is option B.