Which of the following is called ‘first immunization’ of the baby?

• 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