A family consists of six members: Priya, Qureshi, Raj, Xavi, Yusuf, and Zain. Qureshi is the son of Raj, but Raj is not the mother of Qureshi. Priya and Raj are a married couple. Xavi is the daughter of Priya. How many children does Priya have?
a) 1
b) 2
c) 3
d) 4