Question

Which of the following points are collinear?

Answer 1

Are there choices?

Two points are always collinear because you can draw a straight line through two points. But when we say collinear we are usually talking about three or more points.
If you have choices we can spot the answer. If not look for 3 or more points on a straight line in the diagram.

Answer 2

A. B, H, D
B. A, C, E
C. A, H, B
D. C, E, F

Answer 3

They should have used numbers 1,2,3 & 4 to denote the choices because it is confusing with the letters next to them. So just look at the last 3 letters in each choice and see if they all fall in a straight line in the diagram.