(A) 1°/2°/3° alcohol can be differntiated by Lucas test.

(B) Alkene give Br₂ water test but alkane does not

(C) Alkene reacts with NaNH₂

Me – CH₂ – C $\equiv$ CH $\stackrel{{\mathrm{NaNH}}_3}{\to }$ Me–CH –C = C^– Na⁺

(D) 2°/3° Amene can't be differentiated by carbyl amine test.