Ethylene. Option E is correct.
Alkanes are organic compounds that consists of hydrogen and carbon atoms. The general formula for alkanes is CnH2n+2.
Alkanes, also known as paraffins are series of saturated hydrocarbons such as the methane, ethane, pentane, etc.. The alkane compounds alwas end with the suffix
-ane
From the explanation above,you can see that the following words are used alkane, paraffin, saturated, ethane and pentane. Hence the word that does not obelong with others is ethylene since it is not an alkane compound
