This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cornea and sclera, Subject name: Ophthalmology
[{'content': "Which of the following stains is used in Granular dystrophy of cornea \nSelect and explain. \nA. Congo-red, B. Masson's trichrome, C. Colloidal iron, D. PAS", 'role': 'user'}, {'content': 'Answer: B \nExplanation: In granular corneal dystrophy the heredity is autosomal dominant, the opacities formed due to the abnormal accumulation of hyaline protein assume a discrete granular form and subsequently coalecse into various irregular shapes. The intervening cornea between the opacities and peripheral cornea remain clear. Ref:- Parsons diseases of eye; pg num:- 213', 'role': 'assistant'}]