The correct option is C {Whole numbers}
The set of whole numbers(W), natural numbers(N), odd numbers(O) and negative integers(I−) are given by
W={0,1,2,3,4,...}
N={1,2,3,4,5,...}
O={−1,1,−2,2,−3,3,...}
I−={−1,−2,−3,−4,−5,...}
Clearly set of whole number contain 0.
Therefore, {0}⊂W
Option C is correct.