**(a) 2 times**

(b) 2(1/2) times

C. 2(3/4) times

D. 3 times

**Explanation:**

Let Ali’s present age be x years. Then, father’s present age =(x + 3x) years = 4x years.

(4x + 8) = 5/2 (x + 8)

=> 8x + 16 = 5x + 40

=> 3x = 24

=> x = 8.

Hence, required ratio = (4x + 16)/(x + 16) =48 /24 = 2