This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
[{'content': 'True about gall stones - \nSelect and explain. \nA. More common in female, B. Gall stones, haitus hernia, CBD stones form Saints triad, C. Limely bile precipitated, D. Lithotripsy always done', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Women are three times more likely to develop gallstones than men, and first degree relatives of patients with gallstones have a two-fold greater prevalence" Ref -Schwaz, 9/e p1142.', 'role': 'assistant'}]