AB←→ intersects PQ←→ at point M;

Point C is on AB←→ ;

Point R is on PQ←→ ;

△CMR is a right triangle.

Which statement describes the relationship between AB←→ and PQ←→ ?


A.

AB←→ and PQ←→ are skew



B.

AB←→ and PQ←→ are collinear



C.

AB←→⊥PQ←→

D.

AB←→∥PQ←→