A sentence/a part of the sentence is underlined. Below are given alternatives to the underlined part which may improve the sentence. Choose the correct alternative. In case no improvement is needed choose ..No Improvement... Mark your answer in the Answer Sheet.
He `ul("could not be able")` to think logically because of his illness.

Options

A. cannot be able
B. can be unable
C. No improvement
D. was not able

Answer

D

Explanation

can (could) के साथ able का इस्तेमाल नहीं होता।