Determine Whether the Given Set Is Finite or Infinite

Multiple Choice

Determine whether the given set is finite or infinite. Consider the set N of positive integers to be the universal set, and let
A = {n ∈ N| n > 50}
B = {n ∈ N| n < 250}
O = {n ∈ N| n is odd}
E = {n ∈ N| n is even}
-A'

A) infinite
B) finite