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
Least rate of HIV transmission is seen in:
assistant
The correct answer is  Ans. is d, i.e. Cesarean sectionVertical HIV transmission was shown to be reduced by about half when cesarean was compared with vaginal delivery. Ref. Williams 24/e p1282