Can you solve this problem?
- B5D means B is the father of D.
- B9D means B is the sister of D.
- B4D means B is the brother of D.
- B3D means B is the wife of D.
Which of the following means F is the mother of K?
A. F3M5K
B. F5M3K
C. F9M4N3K
D. F3M5N3K
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