This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology (Haemophilus, Yersinia, Spirochaetes, Ricketssia, Chlamydia, Mycoplasma and Miscellaneous Bacteria), Subject name: Microbiology
[{'content': 'Selective culture medium to grow leptospira: \nSelect and explain. \nA. Thayer Main medium, B. Mac Conkey agar, C. Butzler medium, D. EMJH', 'role': 'user'}, {'content': "Answer: D \nExplanation: Culture medium Organism Thayer main medium Neisserial sp (gononococcus & meningococccus) Mac conkey agar Enterobacteriacea Butzler medium Campylobacter jejuni EMJH Leptospira EMJH medium It is semisynthetic liquid medium. Leptospiral growth produces a dense ring of organism just at the under surface of medium called dinger's ring.", 'role': 'assistant'}]