Which point is NOT colinear with two other points?

Three points are collinear if the lie on the same line. You can see that A and C lie both in line q, but no other point does.
Point B,C and D, instead, lie all on line p, and so their are collinear.
So, point B is collinear with points C and D
Point C is collinear with points B and D on line p, and point A on line q
Point D is collinear with points B and C
Point A is collinear only with point C, so that is the answer.