An Organic compound (A) on treatment with acetic acid in the presence of sulphuric acid produces an ester  (B) . (A) on mild oxidation gives (C) . (C) With 50% KOH followed by adification by dil. HCL generates (A) & (D) . (D) With PCl5 followed by reaction with ammonia gives (E) . (E) on dehydration produces  hydrocyanic acid . identify compounds A,B,C,D,E

Also explain ,why do phenols not give the protonation reaction readily ?