If U = {x: x is a whole number} (where U is an universal set) and A = {y: y is a natural number}, then the complement of set A is
Complement of set A = U - A = {0}
If U = {x : x ϵ N}, A = {x : x = 2n, n ∈ N} and B = {x : x is a prime number}, then A ∩ B is ___.