This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Osteoporosis, Sex Hormones and OCPs, Subject name: Pharmacology
[{'content': 'Most common side effect seen with bisphosphonates \nSelect and explain. \nA. Cholelithiasis, B. Constipation, C. Erosive esophagitis, D. Osteonecrosis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: -Bisphosphonates like alendronate and risedronate are used for prophylaxis and treatment of osteoporosis. -Esophagitis is their distinctive side effect. -Precaution is to be taken while taking the drug is to take it with full glass of water and in a sitting/ standing position.', 'role': 'assistant'}]