Explanation: Cyanides, carbides and carbonates are amongst the few carbon-containing compounds which are not classified as organic.The carbon atom is not considered as an organic compound since it is bonded with 2 oxygen atoms.Methane is a chemical compound that has the formula CH₄.Nucleic acids are biomolecules or biopolymers which are essential for all life forms.Propane is a hydrocarbon gas, also called as LPG.Hence, the correct option is (B).