The answer is letter D. Halothane. It has a trademark, Fluothane. This is a general anesthetic, specifically an inhilational anesthetic. Halothane is 2-bromo-2-chloro-1,1,1-trifluoroethane when named using the IUPAC system. Also this is the only anesthetic of its kind to contain an atom of bromine. Halothane is characterized to have a pleasant smell, colorless but very unstable in light.