Difficulty: Medium
Correct Answer: M x N - C + F
Explanation:
Decode the correct chain (d) M x N ⇒ M is father of N. N - C ⇒ N is sister of C ⇒ N and C are siblings, so they share parent M. C + F ⇒ C is brother of F ⇒ C is male.
Conclusion C is the son of M. Other options fail to establish both parentage to M and male gender for C.
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