In the following questions, the sentence given with blank is to be filled in with an appropriate word. Select the correct alternative out of the four.
It is mainly due to Peter's lethargy that the plan fell _______ .

Options

A. off
B. through
C. in
D. out

Answer

B

Explanation

fall through : to not be completed or not happen
Look at the sentence : Our plans fell through because of lack of money.