d = {0, 1, 2}
for x in d:
    print(d.add(x))

d = {0, 1, 2}
for x in d:
    print(d.add(x))

A. 0 1 2
B. 0 1 2 0 1 2 0 1 2 …
C. None None None
D. None of the mentioned

Solution

C. None None None

Explanation

Variable x takes the values 0, 1 and 2. set.add() returns None which is printed.