This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Acute anginal attack can be terminated by: September 2007 
Select and explain. 
A. Nitroglycerin, B. Digoxin, C. Lignocaine, D. Verapamil
A: Nitroglycerin
Answer: A: Nitroglycerin 
Explanation: Ans. A: Nitroglycerin Absorption of Nitrates is most rapid and complete through the mucous membrane.For this reason, nitroglycerin is the most commonly administered sublingually. Their mechanism of action is systemic venodilation with concomitant reduction in LV end diastolic volume and pressure, thereby reducing myocardial wall tension and oxygen requirements. Complications are a pulsating feeling in the head, postural dizziness.