Direction: In each of the following questions, a sentence/a part of the sentence is printed in bold. Four alternatives are given to the bold part which will improve the sentence. Choose the correct alternative as your answer. In case no improvement is needed, choose No improvement.
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Owing to his respiratory problems the doctor has told him to refrain from smoking.
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- to not refrain from
- to refrain to
- to refrain not from
- No improvement
Correct Option: C
Period of time is evident. Hence, Present Perfect
Continuous i.e. has been suffering is the right usage.
