The correct option is C 1, 1-Dichloroethane
Ethylidene chloride is CH3āCHCl2, its IUPAC name is 1, 1-Dichloroethane.
Ethylidene chloride is a geminal dihalide with two carbon atoms. In common name system, gem-dihalides are named as alkylidene halides and vic-dihalides are named as alkylene dihalides.