The Correct option is C) M1 = M2
Kinetic energy of M1 before collision
Kinetic energy of M1 after collision
Kinetic energy transferred from M1 to M2, ΔK = decrease in kinetic energy in projectile
Transfer of energy will be maximum if the difference between the masses is minimum.
If M1 = M2
So, if M1 and M2 are equal then there will be maximum possible transfer of energy.