given: n(A) = 3 and n(B) = 2

To find: distinct elements of set A and B

Also, it is given that {(x, 1), (y, 2), (z, 1)} A × B

Set A has 3 elements whereas Set B has 2 elements.

Also, A × B = {(a, b): a ∈ A and b ∈ B}

Therefore, A ∈ {x, y, z} and B ∈ {1, 2}