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
Most common adverse effect of colchicine - 
Select and explain. 
A. Diarrhoea, B. Peptic ulcer, C. Dyspepsia, D. Pulmonary fibrosis
A: Diarrhoea
Answer: A: Diarrhoea 
Explanation: Ans. is 'a' i.e., diarrhoea "Nausea, vomiting, diarrhea and abdominal pain are the most common untoward effects of colchicine". - Goodman & Gilman