1) Which of the following compounds is not antacid? A) Aluminum hydroxide B) Cimetidine C) Phenelzine D) Ranitidine Answer: Option CExplanation: Aluminium hydroxide $Al(OH)_{3}$, cimetidine and ranitidine are antacids while phenelzine is not Phenelzine is a tranquilizer, not an antacid.
