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: Skin
[{'content': 'Skin test can be done for which hypersensitivity reactions : \nSelect and explain. \nA. I, B. II, C. III, D. All', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. I', 'role': 'assistant'}]