P’s mother is sister of Q and has a daughter A. How can P be related to Q from among the following?

Niece

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

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

   —   ⇒ single line shown "relation between them other than Husband & Wife".

P is not clear any gender. Clearly from the chart (diagram) above but relation to Q is Niece.