Is there a none option? if not then it has to be B.
Answer:
The equivalent expression is 65/63
All you have to do here is some simplifying.
6/12 = what
6 divided by 12 = 1/2
1/2 = 2/4
There! We have our missing value
6/12 = 2/4
Answer: c = 4
Enlargement of 2.
if it were a reduction it'd be getting smaller..