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 colour of cholesterol stone is \nSelect and explain. \nA. Black, B. Brown, C. Dark yellow, D. Pale yellow', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Cholesterol stones Cholesterol stone contains almost entirely cholesterol It is often solitary, pale and yellow in colour Ref: Sabiston 20th edition Pgno :1492', 'role': 'assistant'}]