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
The most rapid relief of symptoms of angina pectoris is found with the administration of: 
Select and explain. 
A. Oxygen, B. Ibubrufen, C. A barbiturate, D. Nitrates
D: Nitrates
Answer: D: Nitrates 
Explanation: None