This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lipids, Subject name: Biochemistry
A 10-year-old boy is presented to ophthalmology OPD for white ring around the black of the eye. His father died of coronary heart disease. O/E Corneal arcus is found, xanthoma on Achilles tendon. His fasting blood cholesterol >300 mg/dl, Triglycerides within normal limit. What is the diagnosis? 
Select and explain. 
A. Type I Hyperlipoproteinemia, B. Type II A Hyperlipoproteinemia, C. Type II B Hyperlipoproteinemia, D. Type III Hyperlipoproteinemia
B: Type II A Hyperlipoproteinemia
Answer: B: Type II A Hyperlipoproteinemia 
Explanation: Ans. B. Type IIA HyperlipoproteinemiaIdentifying features* Corneal arcus* History of coronary artery disease* Tendinous xanthoma* Very high cholesterol level* Triglycerides within normal limit.