This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology (Gram Positive Bacilli, Gram Negative Bacilli), Subject name: Microbiology
[{'content': "A patient is having thick, gray coating on the throat and tonsils, followed with fever, chills and swollen glands in the neck. Microscopic examination of nasopharyngeal or pharyngeal swab showed gram positive organism with a special stain. The constitutes of the stain are:- \nSelect and explain. \nA. Crystal violet. Gram's iodine, B. Toluidine blue, malachite green, glacial acetic, C. Carbol fuchsin, acid alcohol, and methylene blue, D. Methylene blue", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Gram positive organism causing gray colored coating (pseudomembrane) is Corynebacterium diphtheriae . So the specific stain is Albe stain. Contents of Albe stain:-Stain A- glacial acetic acid, malachite green ,toluidine blueStain B- KI + I2', 'role': 'assistant'}]