This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition, Subject name: Pediatrics
[{'content': 'The protective effects of breast milk are known to be associated with: \nSelect and explain. \nA. IgM antibodies, B. Lysozyme, C. Mast cells, D. IgA antibodies', 'role': 'user'}, {'content': "Answer: D \nExplanation: d. IgA antibodies(Ref: Nelson's 20/e p 286-290, Ghai 8/e p 150-161)Although antibodies & lysozyme, both are important for protective effects of breast milk, antibodies (IgA) play a major role.", 'role': 'assistant'}]