input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Metallic taste is due to SnF in saliva is   (A) Stannous triphosphate   (B) Stannic triphosphate   (C) Tin hydroxyl phosphate   (D) Stannous hydroxide
output: ['(C) Tin hydroxyl phosphate <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Stannous triphosphate  (B) Stannic triphosphate  (C) Tin hydroxyl phosphate  (D) Stannous hydroxide <> possible answers', '  Metallic taste is due to SnF in saliva is <> context']