The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of

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The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of -
(A) bromine
(B) fluorine
(C) chlorine
(D) sulphur

Answer: (D) sulphur