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: Pharmacology
Verapamil is not associated with: 
Select and explain. 
A. Diabetes., B. Constipation., C. Bradycardia., D. Increased PR internal.
A: Diabetes.
Answer: A: Diabetes. 
Explanation: Thiazides and beta-blockers are not safe in diabetic patients