Select the compound which on treatment with nitrous acid liberates nitrogen.

The compound which on reaction with cold nitrous acid gives oily nitrosoamine is

The compound which on reaction with cold nitrous acid gives oily nitrosoamine is

An optically active amide (A)C_5H_(11)NO on acid hydrolysis gives an acid and NH_3 . When (A) is treated with bromide and alkali a compound is obtained which one treatment with nitrous acid gives an optically active alcohol and nitrogen. The alcohol gives positive iodoform test. What is the structure of A and show the reactions involved.

Which of the following amine will not react with nitrous acid to give nitrogen