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': 'A child presents with infective skin lesion of the leg culture was done which showed gram+ve cocci in chains which where hemolytic colonies. The test to confirm the organism is - \nSelect and explain. \nA. Bile solubility, B. Optochin sensitivity, C. Bacitracin sensitivity, D. Catalase positive', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]