input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following stain is used for diagnosis of Granular dystrophy of cornea?   (A) Colloidal iron   (B) Congo red   (C) PAS   (D) Masson trichrome
output: ['(D) Masson trichrome <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Colloidal iron  (B) Congo red  (C) PAS  (D) Masson trichrome <> possible answers', '  Which of the following stain is used for diagnosis of Granular dystrophy of cornea? <> context']