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: Gynaecology & Obstetrics
[{'content': 'Virus is shed during which phase of herpes simplex virus infection \nSelect and explain. \nA. Vesicle and crusting stage, B. Vesicle and ulceration stage, C. Ulceration and crusting stage, D. Crusting stage alone', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Virus is shed during first two phases of herpes genitalis. i.e vesicle and ulceration.', 'role': 'assistant'}]