QUESTION $1$

Which option lists incorrect statements about ethane $(C{H}_{3}C{H}_3)$ and ethyl $(-C{H}_{2}C{H}_3)?$

I. Ethane is an independent compound while ethyl is not.

II$.$ Both ethane and ethyl are independent compounds.

III. The reason why ethyl has one less $H$ than ethane is because only then ethyl can be attached molecule.

IV$.$ Ethyl serves as a branch in a compound.

V$.$ Both ethane and ethyl are hydrocarbons.

I and III

II and IV

II

II and $V$

$1$