Assertion :Mass is not conserved, but mass and energy are conserved as a single entity is called mass-energy.
Reason : Mass and energy are inter-convertible in accordance with Einstein'* relation, E= mc2.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not correct explanation of A
(c) A is true but R is false
(d) A and R are false
