input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following anti-tubercular drug can cause ophthalmological toxicity?   (A) Isoniazid   (B) Rifampicin   (C) Ethambutol   (D) Pyrazinamide
output: ['(C) Ethambutol <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Isoniazid  (B) Rifampicin  (C) Ethambutol  (D) Pyrazinamide <> possible answers', '  Which of the following anti-tubercular drug can cause ophthalmological toxicity? <> context']