This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
[{'content': 'Which of the following is called ‘first immunization’ of the baby? \nSelect and explain. \nA. Colostrum, B. Handing over the baby to mother, C. OPV, D. DPT+BCG', 'role': 'user'}, {'content': 'Answer: A \nExplanation: • It is the most suitable food immediately after birth of the baby; Regular milk comes 3 – 6 days after birth\n• Also known as ‘Beestings’, ‘First milk’ or ‘Immune Milk’\n• High in carbohydrates, protein, and antibodies and low in fat\n• Contains all five immunoglobulins found in all mammals, IgA, IgD, IgE, IgG and IgM\n• Known as ‘first immunization’ of newborn', 'role': 'assistant'}]