Which one of the réaction is called Libermann’s nitroso set?
(a) N - methyl aniline Conc. + NaNO2/Conc.HCl → N - nitroso methyl phenylamine.
(b) Aniline NaNO2 + HCl + 273-278k → Benzene diazonium chloride.
(c) Aniline + CHCI3 + 3KOH → Phenyl iso cyanide.
(d) Methyl amine + CHCl3 + 3KOH → Methyl iso cyanide.