input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Main crystalline component of calculus is   (A) Hydroxyapatite   (B) Octacalcium phosphate   (C) Magnisium whitlockite   (D) Brushite
output: ['(A) Hydroxyapatite <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Hydroxyapatite  (B) Octacalcium phosphate  (C) Magnisium whitlockite  (D) Brushite <> possible answers', '  Main crystalline component of calculus is <> context']