ANSWER
Butane is a hydrocarbon molecule containing four carbon atoms and only single bonds
EXPLANATION
Butane is a hydrocarbon that contains only carbon and hydrogen atoms only. Butane belongs to the alkane formula with the general molecular formula CnH2n+2.
n is the number of carbon atoms
Recall, that alkanes has single bond between its carbon to carbon atom
In the alkane family, butane has 4 carbon atoms and only single bond
Therefore, butane is a hydrocarbon molecule containing four carbon atoms and only single bonds
Option B is the correct answer
