A particle of mass M initially at rest splits into two. If one of the particles of mass M1 moves with velocity V1 , the second particle moves with velocity
A
\(\frac{M1V1}{M-M1}\)
B
\(\frac{M1V1}{M1-M}\)
C
\(\frac{M1V1}{M}\)
D
\(\frac{MV}{M-M1}\)