Presently which reagent is used for separation of `1^(@),2^(@)` and `3^(@)` amines

Options

A. p- toluene sulphonyl chloride
B. Benzene sulphonyl chloride
C. p- Amino benzene sulphonyl chloride
D. m- toluene sulphonyl chloride

Answer

A

Explanation

Benzene sulphonyl chloride is used to distinguish `1^(@), 2^(@) and 3^(@)` amines but now a day benzene sulphonyl chloride is replaced by p-toluene sulphonyl chloride.