If A # B means ‘A is the sister of B’.

A @ B means A is the mother of B,

then which of the following expressions means C is the mother of F ?

C @ H # M # F

Explanation:

Note:

↑ or ↓ ⇒ Upward or downward line shown "generation gap" .

   =    ⇒ Double lines shown "relation b/w Husband & Wife"

   —   ⇒ single line shown "relation in same generation other than Husband & Wife".

   +   ⇒ Plus sign shown " Male".

   -   ⇒ Plus sign shown " Female".

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Therefore, C is the mother of F.