Let O be the origin. Let OP-xi+yj-k and OQ = -i +2j + 3xk, x, y ∈ R, X> 0, be such that IPQI= √20and the vector OP is perpendicular to OQ.if OR-3i+zk-7k,z ∈R, , is coplanar with OP and OQ, then the value of x²+y² +z² is equal to:
A. 2
B. 9
C. 1
D. 7