When compound X undergoes complete combustion, the only products formed are carbon dioxide and water. X gives steamy fumes with $\text{PCl}_5$. X shows no visible reaction with 2,4-dinitrophenylhydrazine reagent. What can be deduced with certainty from this information?
- AX is a carboxylic acid.
- BX is a hydrocarbon.
- CX is an alcohol.
- DX is not an aldehyde.