The following sentence has been split into four segments. Identify the segment that contains a grammatical error.
Only five minutes / are allowed / for each speaker / during the function.

Correct option is C

Option (c) contains an error.
Explanation: The subject is “five minutes,” which is a duration of time and hence considered singular. The verb should be singular — “is allowed.”
Grammatical rule used:
When units of time, money, distance, or measurement are used as a whole or fixed quantity, they take a singular verb.
Example: Ten rupees is not enough.
Five years is a long time.
Information Booster:
Expressions of time like “ten minutes,” “five hours” are grammatically singular when seen as a block of time.