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
Digoxin is contraindicated in(REPEAT) 
Select and explain. 
A. Supraventricular tachycardia, B. Atrial fibrillation, C. Congestive hea failure, D. Hyperophic obstructive cardiomyopathy
D: Hyperophic obstructive cardiomyopathy
Answer: D: Hyperophic obstructive cardiomyopathy 
Explanation: non selective beta blockers(propanolol)are the Agents of choice for hyperophic obstructive cardiomyopathy in hyperophic obstructive cardiomyopathy, the left ventricular outflow tract is narrowed during systole due to hyperophic septum.. obstraction is worsened by Factors increasing myocardial contractility-digitalis,sympathetic stimulation factors decreasing left ventricular filling-valsalva maneuver,peripheral vasodilators Refer kDT 6/e p143