Assertion: A ccording to the principle of conservation of energy, all heat can be converted into mechanical work.
Reason: Due to various losses, it is im possible to convert all heat into mechanical work.
Options:
(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 the correct explanation of A.
(c) A is true but R is false.
(d) A is false and R is also false.