This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood Disorders, Subject name: Pediatrics
[{'content': 'Anti-A, anti-B, antibody appear in child - \nSelect and explain. \nA. Just after birth, B. 1 week after, C. 6 week after, D. After 6 months', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e.. After 6 months o litre of anti-A and anti-B antibodies is almost zero immedietly after birth.o Infants start producing anti-A and anti-B antibodies at age of 2-8 month when corresponding antigen is not present in cell.o Maximum titre rech at 8 to 10 years of age after that it started declinning.", 'role': 'assistant'}]