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': 'Obligatory intracellular organism is ? \nSelect and explain. \nA. Mycoplasma, B. Chlamydae, C. Cryptococcus, D. H.pylori', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Chlamydia", 'role': 'assistant'}]