Find the part of the given sentence that has an error in it. If there is no error, choose ‘No error’.
There were a time when scientists took this myth seriously.

Correct option is D

The correct phrase should be “There was a time” since “time” is singular and requires a singular verb. “Were” is used with plural subjects.
Grammatical Rule Used:
Subject-verb agreement – Singular subjects take singular verbs. “There was” is used with a singular noun like “a time”.
Explanation of the rule in Hindi:
यदि subject singular है (जैसे “a time”), तो verb भी singular होनी चाहिए (“was”)। “were” का प्रयोग plural subjects के साथ होता है।
Meanings of all options:
· (a) this myth seriously: Correct segment (इस मिथक को गंभीरता से लेना).
· (b) when scientists took: Correct past tense clause.
· (c) No error: Incorrect, there is an error in (d).
· (d) There were a time: Incorrect subject-verb agreement.