Explanation:

Let the age of Shipra be s and Malini be m.
s + m = 65 ----(1)
After 5 years ,
s + 5 = m + 5 + 15
s - m =15-----(2)
Solving (1) and (2) , we get ,
s = 40 and m = 25
So , the answer would be option a)25 years.