Topic: verb (ক্রিয়া),

Best Answer Explained in Below-:

The correct choice in the sentence "I let him (go) there" is D) "go" because of how the verb "let" functions in English grammar. The verb "let" is a causative verb, which is used to indicate permission or allowing someone to perform an action. In this context, "let" is followed by the base form of another verb, which in this case is "go."

When using "let," the structure is typically: [subject] + let + [object] + [base form of the verb]. Thus, the sentence correctly becomes "I let him go there," indicating that the subject (I) permitted the object (him) to perform the action (go there).

The other options do not work in this context: "going" (A) is the present participle, which would be incorrect here; "went" (B) is the past tense form, which does not fit with the causative structure; and "have gone" (C) is the present perfect form, also inappropriate in this structure. Therefore, "go" is the only choice that correctly completes the sentence given the grammatical rules surrounding the verb "let."