A neutron having mass of 1.67 10-27 kg and moving at 108 m/s collides with a deutron at rest and sticks to it. If the mass of the deutron is 3.34 10-27 kg; the speed of the combination is (a) 2.56 10 m/s X (c) 3.33 107 m/s (b) 2.98 x 105 m/s (d) 5.01 x 10 m/s