The following sentence has been split into four segments. Identify the segment that contains a grammatical error.
Although we had / very good batsmen, / we couldn’t be able to / score high.

Correct option is C

Option (c) contains an error.
Explanation: The phrase "couldn’t be able to" is grammatically incorrect. "Could" and "be able to" both show ability, so using them together is redundant.
Correct form: “we couldn’t score high” or “we were not able to score high.”
Grammatical rule used:
Avoid using two modal or modal-like expressions that express the same meaning.
Example: He can't lift it OR He is not able to lift it.
Information Booster:
Use “could” for past ability and “be able to” when referring to present/future or to add emphasis.