Choose the part of the sentence that contains an error:
He has been living in Chennai since five years.

Correct option is C

Option (c) contains an error.
Detailed explanation:
· With a period of time (e.g., five years), use for, not since. Since is used with a point in time (e.g., since 2020, since Monday, since 5 p.m.).
· Moreover, actions that began in the past and continue to the present normally take the present perfect (continuous), not simple present continuous for duration with since/for.
· Corrected sentence: He has been living in Chennai for five years.
· Grammatical rule used:
· Since + point in time / For + period of time.
· Present Perfect Continuous: has/have + been + V-ing to indicate an action that started in the past and is still continuing.
· Example: She has been working here since 2019. / They have been studying for three hours.
· Information booster:
· With stative verbs ( know, believe, love), prefer present perfect simple: I have known him for ten years.
· Since can also be a conjunction meaning “because”: Since it’s raining, we’ll stay in. Here it doesn’t denote time.