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
[{'content': 'Most common adverse effect of colchicine - \nSelect and explain. \nA. Diarrhoea, B. Peptic ulcer, C. Dyspepsia, D. Pulmonary fibrosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is \'a\' i.e., diarrhoea "Nausea, vomiting, diarrhea and abdominal pain are the most common untoward effects of colchicine". - Goodman & Gilman', 'role': 'assistant'}]