Given below are an Assertion (A) and a Reason (R):
Assertion (A): I/O protection is ensured by a hardware trap.
Reason (R): I/O interrupts are caused by conditions such as I/O completion and device malfunction occurring within I/O devices.
In light of the above, choose the correct answer.

1. A(A) Both A and R are true and R is the correct explanation of A
2. B(B) Both A and R are true but R is NOT the correct explanation of A
3. C(C) A is true but R is false
4. D(D) A is false but R is true

Pick an option to check yourself, or open the answer below.