" 19] Heaviest particle is "

The heaviest particle is

The heaviest subatomic particle is

The heaviest subatomic particle is

Among the following the heaviest subatomic particle is

What percentage of kinetic energy of a moving particle is transferred to a stationary particle it strikes when the stationary particle has a mass (a) 19 times (b) equal to (c) 1/19 times the mass of the moving particle ?