Father's Age

Father is aged three times more than his son Ronit. After 8 years, he would be two and half times of Ronit's age. After further 8 years how many times would he be of Ronit's age?
(a) 2 times
(b) 2 ½ times
(c) 2 ¾ times
(d) 3 times

(a)