P and Q are married couple. A and B are brothers. A is the brother of P. How is B related to Q?

Brother-in-law

The correct answer is Option (1) → Brother-in-law

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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