A and B are the brothers of C. B is the son of D and E. D is the daughter of F. P is the father-in-law of E. Q is the son of F. What is the relationship of A to P?

Grandson

ATQ,

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Please note:

  l   ⇒ Vertical line shown "generation gap".

 =  ⇒ Double lines shown "relation of spouse" 

—  ⇒ Horizontal line shown "relation in same generation other than spouse".

     ⇒ Rectangular box shown " Male".

     ⇒ Circular box shown " Female".

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