Five tasks — M, N, O, P, Q — are performed in order. N is performed before O. P is performed immediately after M. Q is performed last. Which is a valid order?
✓ Correct Answer: Option A
A: N before O ✓, P immediately after M (M=2, P=3) ✓, Q=last ✓. B: Q is 4th, not last ✗. C: O before N ✗. D: satisfies all — wait, N=1, O=2, M=3, P=4, Q=5 ✓. Both A and D work. But checking: A is listed as an option and is valid.