Match List I with List II. List I: (A) Stack overflow, (B) Timer, (C) Invalid opcode, (D) Supervisor call. List II: (I) Software interrupt, (II) Internal interrupt, (III) External interrupt, (IV) Machine check interrupt.

1. A(A)-(I), (B)-(II), (C)-(III), (D)-(IV)
2. B(A)-(II), (B)-(III), (C)-(I), (D)-(IV)
3. C(A)-(I), (B)-(II), (C)-(IV), (D)-(III)
4. D(A)-(II), (B)-(III), (C)-(IV), (D)-(I)

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Correct answer: D. (A)-(II), (B)-(III), (C)-(IV), (D)-(I)

Explanation

Stack overflow is an internal interrupt (trap); a timer is external; an invalid opcode raises a machine-check style exception (per the key); a supervisor call is a software interrupt.