This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast Milk & Breast Feeding, Subject name: Pediatrics
[{'content': 'Colostrum is rich in: \nSelect and explain. \nA. IgA, B. IgE, C. IgG, D. IgM', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Colostrum contains more antibodies (IgA), immunocompetent cells & vitamins A,D,E,K', 'role': 'assistant'}]