This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'H.parainfluenzae requires which of the following factors \nSelect and explain. \nA. Only Factor X, B. Only Factor V, C. Both factor X and V, D. None of the above', 'role': 'user'}, {'content': "Answer: A \nExplanation: H.influenzae, H.haemolyticus, and H.aegyptius: requires both factor X and VH.parainfluenzae, H.parahaemolyticus, and H.paraphrophilus: Requires only factor VH.aphrophilus: Doesn't require both factors(Ref: Ananthanarayan 9th edition, p328)", 'role': 'assistant'}]