This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': "A 12-year-old child presents with fever and cervical lymphadenopathy. Oral examination shows a grey membrane on the right tonsil extending to the anterior pillar. Which of the following medium will be ideal for the culture of the throat swab for a rapid identification of the pathogen - \nSelect and explain. \nA. Nutrient agar, B. Bloodagar, C. Loffler's serum slope, D. Lowenstein Jensen medium", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Rapid identification of C. diphtheria: Loffler’s serum slope (6–8 hour)\nBest media for isolation in carriers/contacts/convalescent: PTA (48 hour)\nMetachromatic granules best develops on: Loffler’s serum slope\n\nRef: Apurba Sastry’s Essentials of Medical Microbiology 1/e p246, Ananthanarayan 9/e p237', 'role': 'assistant'}]