Statement-1 : Total linear momentum of system in centre of mass frame is zero only when there is no net external force.
Statement-2 : Total linear momentum of system is conserved in absence of net external force.
A. Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.
B. Statement -1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1.
C. Statement-1 is true, statement-2 is false.
D. Statement-1 is false, statement-2 is true.
