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: Biochemistry
[{'content': 'Defect in type II hyperlipidemia \nSelect and explain. \nA. Apo-E, B. Lipoprotein lipase, C. LDL receptor, D. None', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Familial hypercholesterolemia (type Ha) is due to deficiency of functional LDL receptors as a result of different types of mutations.', 'role': 'assistant'}]