$A$ (organic compound) $+ O_2 \to X + Y + Z$. Compound $(A)$ in pure form does not give a precipitate with $AgNO_3$ solution. $A$ mixture containing $70\%$ of $(A)$ and $30\%$ of ether is used as an anaesthetic. Compound $(X)$ and $(Y)$ are oxides while $(Z)$ is a pungent smelling gas. $(X)$ is a neutral oxide which turns cobalt chloride paper pink. Compound $(Y)$ turns lime water milky and produces an acidic solution with water. Compounds $(A), (X), (Y)$ and $(Z)$ respectively will be:

• A
  $CH_4, H_2O, CO_2, Cl_2$
• B
  $CHCl_3, H_2O, CO_2, Cl_2$
• C
  $CH_3OH, H_2O, CO_2, N_2$
• D
  $NH_2CONH_2, H_2O, N_2O, CO_2$