ECAT Engineering Exams Quizzes MCQs Quizzes ECAT Engineering Entry Test 2017 English Active and Passive Voice 3

Question:
I am not doing sums.

Option A):
Sums had not been done by me.
Option B):
Sums have not been done by me.
Option C):
Sums were not being done by me.
Option D):
sums are not being done by me

Correct Answer is Option D):
sums are not being done by me