Which of the Following Molecules Contain(s)a Nonpolar Functional Group

Which of the following molecules contain(s) a nonpolar functional group?

A) All of these molecules contain nonpolar functional groups.
B) All of these molecules except V contain a nonpolar functional group.
C) All of these molecules except III and V contain a polar functional group.
D) Only III and V contain a nonpolar functional group.
E) Only III contains a nonpolar functional group.