An optically active alkyl halide \({\mathrm{C}}_{4}{\mathrm{H}}_{9}\mathrm{Br}[\mathrm{A}]\) reacts with hot \(\mathrm{K…

An optically active alkyl halide \({\mathrm{C}}_{4}{\mathrm{H}}_{9}\mathrm{Br}[\mathrm{A}]\) reacts with hot \(\mathrm{KOH}\) dissolved in ethanol and forms alkene [B] as major product which reacts with bromine to give dibromide [C]. The compound [C] is converted into a gas [D] upon reacting with alcoholic \({\mathrm{NaNH}}_{2}\). During hydration 18 gram of water is added to 1 mole of gas [D] on warming with mercuric sulphate and dilute acid at 333 K to form compound [E]. The IUPAC name of compound [ E ] is

[JEE Main 2025, 2 Apr (Shift 1)]