In each of the following questions,a sentence/a part of the sentence is printed in the bold part which will improve the sentence.Choose the correct alternative corresponding to it.In case no improvement is needed,choose the alternative corresponding to"No improvement"
You will not succeed unless you don’t work hard.

Options

A. Will not work hard
B. Will not work hard
C. Should work hard
D. Work hard

Answer

C

Explanation

Unles should be followed by affirmative sentence i.e., work hard.
Unless=(except if)