Identify the segment in the sentence which contains the grammatical error.
We often went for boating when we live in Nainital.

Correct option is D

Option (d) contains an error.
Explanation:
The main clause is in the past tense ("We often went"), so the dependent clause should also be in the past tense.
“live” (present) should be replaced with “lived” (past).
Correct sentence: We often went for boating when we lived in Nainital.
Grammatical rule used:
· Tense consistency: When both actions are in the past, both verbs must reflect that.
· Mismatching tenses in such cases causes grammatical inconsistency.
Example:
I watched TV when I lived in Mumbai. (Not "live")