This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
[{'content': 'Haemophilus parainfluenza requires which of the following factors \nSelect and explain. \nA. Factor V, B. Factor X, C. Both factor V and X, D. Factor XI', 'role': 'user'}, {'content': "Answer: B \nExplanation: Factor X has a group of heat stable compounds that synthesize enzymes like cytochrome and catalase involved in aerobic respiration. Since H influenza grows aerobically, it's needs it", 'role': 'assistant'}]