In that case, you need to check for all of these as follows:
1) 3/8 * 1/2 = 6/8 = 3/4
It is greater than 1/2
2)3/16 * 1/2 = 6/16 = 3/8
It is smaller than 1/2
3)6/25 * 1/2 = 12/25
It is smaller than 1/2
4)1/3 * 1/2 = 2/3
It is greater than 1/2
So, Option (B) & (C) are your answers.
Hope this helps!