This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gall Bladder & Bile Ducts, Subject name: Surgery
[{'content': 'False about brown pigmented stones: \nSelect and explain. \nA. Associated with disorders of biliary motility and associated bacterial infection, B. More common in Caucasians, C. Soft and earthy in texture, D. High content of cholesterol and calcium palmitate', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) More common in Caucasians* Brown stones may happen in disorders of motility + Bacterial infection* MC in ASIANS* Soft and earthy stone.* Content: Ca.Bilirubinate +Ca. Palmitate +Ca Stearate + Cholesterol(Black stone- Insoluble Bilirubin Polymer +Ca. PO4 + Ca. bicarbonate)', 'role': 'assistant'}]