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
Defect in type II hyperlipidemia 
Select and explain. 
A. Apo-E, B. Lipoprotein lipase, C. LDL receptor, D. None
C: LDL receptor
Answer: C: LDL receptor 
Explanation: Familial hypercholesterolemia (type Ha) is due to deficiency of functional LDL receptors as a result of different types of mutations.