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
Headache is commonly seen with which anti-anginal drug? 
Select and explain. 
A. Beta blockers, B. Nitrates, C. Trimetazidine, D. Potassium channel openers
B: Nitrates
Answer: B: Nitrates 
Explanation: Nitrates produce headache because of vasodilatation of meningeal vessels. Ref katzung 12th ed.