This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Concepts of Immunity, Classification of Vaccines, Subject name: Social & Preventive Medicine
[{'content': "Which of the following is called 'first immunization' of the baby? \nSelect and explain. \nA. OPV, B. Handing over the baby to mother, C. Colostrum, D. DPT + BCG", 'role': 'user'}, {'content': "Answer: C \nExplanation: COLOSTRUM: Is the most suitable food immediately after bih of the baby; Regular milk comes 3-6 days after bih Aka 'Beestings', 'First milk' or 'Immune Milk'. High in carbohydrates, proteins, antibodies & low in fat Contain all five immunoglobulins found in all mammals, IgA (highest), IgD, IgE, IgG & IgM Known as 'first immunization' of newborn Energy 55 Kcal/100 ml Proteins 2 g/100 ml", 'role': 'assistant'}]