Examine the intersection of these two lines: 2 lines intersect to form 4 angles. From the top, clockwise, the angles are 1, 4, 2, 3.

Which pairs of angles are adjacent? Select all that apply.
∠1 and ∠2
∠1 and ∠3
∠1 and ∠4
∠2 and ∠3
∠2 and ∠4
∠3 and ∠4