Which of the following is the S.I. unit of momentum?

Momentum is defined as the quantity of motion of the body. Momentum depends upon the mass and velocity.
 In terms of the equation,  Momentum (p) =  mass(m) x velocity (v).

 $p=m\times v$ = kg x (m/s). 

$\therefore$The S.I. unit of momentum is kg m/s.