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
True about third heart sound is -a) Absent in Chr. constrictive pericariditisb) Absent in aortic aneurysmc) Absent in MSd) Normal physiologically in Athletes
assistant
The correct answer is  None