Question

Assertion(A) ----- Internal energy of an isolated system does not change.

Reason(R) -------- Internal energy is a state variable.
(a) Both A and R are true and R is the correct explanation of A.

(b) Both A and R are true and R is NOT the correct explanation of A.

(c) A is true but R is false.

(d) A is false and R is true.​

Answer 1

Answer:

b is the answer i guess

Explanation:

If right , Please mark it as the brainliest