<prompt> Which is beta antagonist?SalbutamolPropanololSalmeterolAlbuterol  <response>: Ref:KD Tripathi pharmacology 7th edition page.no: 144 classification of b blockers : Nonselective b 1 and b 2 a.Without intrinsic sympathomimetic activity; Propranolol, Sotalol, Timolol. b.With intrinsic sympathomimetic activity ; Pindolol c.With additional a blocking propey ; Labetalol, Carvedilol Cardioselective b1 Metoprolol, Atenolol, Acebutolol, Bisoprolol; Esmolol, Betaxolol, Celiprolol, Nebivolol beta -2-agonists- Salmeterol, Salbutamol 