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': 'Pneumocystis carinii is a fungus because -a) rRNA, mitochondrial protein gene sequence & presence of thymidylate synthaseb) Cell wall contains glucansc) Antifungals are effective against P. cariniid) Commonest infection in AIDS \nSelect and explain. \nA. abc, B. bc, C. acd, D. bcd', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]