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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
Anti-A, anti-B, antibody appear in child ?
assistant
The correct answer is  Ans. is 'd' i.e., After 6 months Titre of anti-A and anti-B antibodies is almost zero immedietly after bih. Infants sta producing anti-A and anti-B antibodies at age of 2-8 month when corresponding antigen is not present in cell. Maximum titre rech at 8 to 10 years of age after that it staed declinning.