Correct option is B
The correct option to fill in the blank is (b)
remains.
Explanation: The subject of the clause "There is only one thing" is singular, so we require a singular verb to match. The correct present tense singular verb form is
"remains".
It also maintains the correct structure and tense with “that cannot be taken away,” which implies present general truth.
Example: There is only one thing that remains constant in life—change.
Explain why other options are incorrect:
· (a) have remained – Plural auxiliary verb “have” does not agree with the singular subject “thing” (गलत subject-verb agreement)
· (c) remaining – Present participle/adjective form; grammatically incorrect in this clause (participle misuse)
· (d) remained – Past tense; incorrect because sentence implies a present universal truth (tense mismatch)
Information Booster: In subject-verb agreement, words like "each," "every," "one," "thing," etc., are singular and require singular verbs like "is," "has," "remains," etc.