This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
Potassium channel opener with anti-anginal activity is: 
Select and explain. 
A. Nicorandil, B. Dipyridamole, C. Dofetilide, D. AMIODARONE
A: Nicorandil
Answer: A: Nicorandil 
Explanation: Nicorandil opens ATP-dependent K+ channels causing aerial dilatation thus increasing afterload-potassium channel opener-used for angina Amiodarone and dofetilide are potassium channel blockers- class 3 antiarrhythmic agents REF.Essentials of Medical Pharmacology KD Tripathi 8th ed.