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': 'Herpes virus is shed during which week of Herpes genitalis infection \nSelect and explain. \nA. First week, B. Second week, C. Third week, D. Fourth week', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Virus is shed usually only during 1st week of Herpes genitalis infection.', 'role': 'assistant'}]