A, B and C are square matrices of order 2 such that AB = C.

Assertion (A): Product BA need not be equal to C.

Reason (R): Matrix multiplication is not associative.

1. Assertion (A) is true, but Reason (R) is false.

2. Assertion (A) is false, but Reason (R) is true.

3. Both Assertion (A) and Reason (R) are correct, and Reason (R) is the correct reason for Assertion (A).

4. Both Assertion (A) and Reason (R) are correct, and Reason (R) is incorrect reason for Assertion (A).