All these drug groups useful in angina both decrease myocardial oxygen requirement (by decreasing the determinations of oxygen demand) and increase myocardial oxygen delivery (by reversing coronary arterial spasm), EXCEPT:
a) Nitrates and nitrite drugs (Nitroglycerin, Isosorbide dinitrate)
b) Calcium channel blockers (Nifedipine, Nimodipine)
c) Beta-adrenoceptor-blocking drugs (Atenolol, Metoprolol)
d) Potassium channel openers (Minoxidil)
C
C
C
C
C