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': 'Proteus isolated from a patient of UTI will show which boichemical reaction: \nSelect and explain. \nA. Phenylpyruvic acid reaction, B. Bile esculin reaction, C. Colchicine sensitivity, D. Bacitracin sensitivity', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is. 'a' i. e., Phenylpyruvic acid reaction", 'role': 'assistant'}]