input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** On laboratory investigations in a patient, LDL was highly elevated but the level of LDL receptors was normal. Which of the following is most probable cause?   (A) Phosphorylation of LDL receptors   (B) Lipoprotein lipase deficiency   (C) Apo B-100 mutation   (D) Cholesterol Acyl Co-A transferase deficiency
output: ['(C) Apo B-100 mutation <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Phosphorylation of LDL receptors  (B) Lipoprotein lipase deficiency  (C) Apo B-100 mutation  (D) Cholesterol Acyl Co-A transferase deficiency <> possible answers', '  On laboratory investigations in a patient, LDL was highly elevated but the level of LDL receptors was normal. Which of the following is most probable cause? <> context']