The ratio of the present ages of A to B is 5 : 3. The ratio of A's age 4 years ago to B's age 4 years hence is1 : 1. What is the ratio of A's age is 4 years hence to B's age 4 years ago? (A)3 : 2
(B) 7 : 5
(C) 3 : 1
(D) 2 : 3
(E) 1 : 3
