Directions:
Change the voice of the following. (Active & passive voice)

Question:
They are not solving the sums correctly.

Option A):
The sums are not solved by them correctly.
Option B):
The sums have not been solved by them correctly.
Option C):
The sums are not being solved by them correctly.
Option D):
The sums were not solved by them correctly.
Option E):
The sums are being not solved by them correctly.

Correct Answer is Option C):
The sums are not being solved by them correctly.