system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Transmission of hepatitis A virus occurs -a) One week before and one week after onset of symptomb) 2 weeks before onset of symptomsc) 2 weeks after onset of symptomsd) 1 week after onset of symptoms
assistant
The correct answer is  None