Question

The following is a subset of A = {1, 2, 3, 4, 5}, except: *

= {3, 4, 5}
= {1, 2}
= {7}
= {2, 3, 4, 5}​

Answer 1

A subset only includes element from the original set.

Answer #3 has "7" in it, but 7 isn't in Set A, so it cannot be a subset.