18. An object 0 moving at 10 m s'l towards the right explodes into two parts Xand Y. The mass OfX is 3 times that of Y. Assume that 0, Xand Ymove along the same straight line and no external net force acts on them. Which of the following could be the velocities of X and Y after the explosion? The direction towards the right is taken as positive. Velocity ofX/ m 5'1 Velocity of Y/ m s'1 (1 ) 4 12 (2) 5 25 (3) 14 2 A. (1) only B. (2) only C. (1) and (3) only D. (2) and (3) only