A carbon compound consists of two carbon atoms. Which name should the compound of carbon have?

Ethane 

The correct answer is option 2. Ethane.

A carbon compound consisting of two carbon atoms should be named Ethane. Ethane is an alkane with the chemical formula C2H6. It is the simplest hydrocarbon containing two carbon atoms bonded together by single covalent bonds. Ethane is a colorless, odorless gas at standard temperature and pressure and is commonly used as a fuel and as a feedstock in the chemical industry.

Therefore, the correct answer is Ethane.