How Does an Alkyl Group Differ from Its Parent Alkane

How does an alkyl group differ from its parent alkane?

A) An alkyl group has a larger structure than its parent alkane.
B) An alkyl group contains one more hydrogen atom than its parent alkane.
C) An alkyl group contains one less carbon atom than its parent alkane.
D) An alkyl group contains one less hydrogen atom than its parent alkane.
E) There is no difference between an alkyl group and its parent alkane.