What is A' ∩ (B-C)?

Question

Let A = {1,2,3,6,7} B= {2,4,5,7} and C = {2,4,6} and U = {1,2,3,4,5,6,7,8}

a. {6}

b. {5}

c. {}

d. none of these

I have answered B. {5} am I correct?

Answer 1

A' = {4,5,8}

it intersects B at {4,5} but C is subtracted leaving only the {5}