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
Propranolol should not be given to a patient on treatment with which of the following drug 
Select and explain. 
A. Nifedipine, B. Nitrates, C. Verapamil, D. ACE inhibitor
C: Verapamil
Answer: C: Verapamil 
Explanation: Refer kDT 6/e p 533 Propranolol is contraindicated in patients with asthma, chronic obstructive pulmonary disease (COPD), atrioventricular (AV) block, intermittent claudication, and psychosis. The most frequent adverse effects are lightheadedness, fatigue, dyspnea upon exeion, bronchospasm, insomnia, impotence, and apathy. In COPD cases, calcium channel blockers are indicated in place of beta blockers