This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
[{'content': 'Yellowing of the skin occurs in hypothyrodlsm bcausc of - \nSelect and explain. \nA. Increased bilirubin, B. Increased cholesterol, C. Increased carotene, D. Increased', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Question repeated', 'role': 'assistant'}]