Among the following structures, which will show the most stable enamine formation? (Where Me is $$-$$CH₃)

Which of the following sets are correct regarding polymer?

(A) Copolymer : Buna-S

(B) Condensation polymer : Nylon-6,6

(C) Fibres : Nylon-6,6

(D) Thermosetting polymer : Terylene

(E) Homopolymer : Buna-N

Choose the correct answer from given options below :

A chemical which stimulates the secretion of pepsin is :

Which statement is not true with respect to nitrate ion test?