1.use the figure to answer the question. name a pair of vertical angles
a. ∠2 and ∠5
b.∠2 and ∠6
c.∠3 and ∠4
d. ∠5 and ∠6

It would be A because for vertical angles they have to be made by intersecting lines!!

There are three pairs of vertical angles. Each pair is equal in the size and facing each other. The three pairs are:
∠1 and ∠4
∠2 and ∠5
∠3 and ∠6

So the answer is option A