This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Corynebacterium, Subject name: Microbiology
A child has respiratory infection with membrane over Peritonsillar area. Swab was taken from the local area. The appropriate media for culture is : 
Select and explain. 
A. L.J. media, B. Blood tellurite media, C. Cary media, D. Loeffler serum slope
D: Loeffler serum slope
Answer: D: Loeffler serum slope 
Explanation: Ans. is 'd' Loeffler serum slope A child with respiratory infection and membrane over peritonsillar area is suspected of having Diptheria.Both Blood Tellurite media & Loeffler serum slope can be used for culture but Diptheria is one emergency so the media in which it can be cultured quickly is used (Loeffler serum slope). Loeffler serum yield colony in - 6 - 8 hrs Blood Tellurite yield colony in - 36-48 hrs