Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr respectively in opposite directions on parallel tracks. The time which they take to cross each other, is

A. 9.8 seconds

B. 10.8 seconds

C. 11.8 seconds

D. 12.8 seconds

Please do not use chat terms. Example: avoid using "grt" instead of "great".