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
Which of the following is called ‘first immunization’ of the baby? 
Select and explain. 
A. Colostrum, B. Handing over the baby to mother, C. OPV, D. DPT+BCG
A: Colostrum
Answer: A: Colostrum 
Explanation: • It is the most suitable food immediately after birth of the baby; Regular milk comes 3 – 6 days after birth
• Also known as ‘Beestings’, ‘First milk’ or ‘Immune Milk’
• High in carbohydrates, protein, and antibodies and low in fat
• Contains all five immunoglobulins found in all mammals, IgA, IgD, IgE, IgG and IgM
• Known as ‘first immunization’ of newborn