Immunoglobulin abundant in colostrum is

The correct option is B IgA

• Immunoglobulin A (IgA) is an antibody that plays a crucial role in the immune function of mucous membranes.
• Colostrum is a milky fluid that comes from the breasts of humans, cows, and other mammals the first few days after giving birth before true milk appears.
• Immunoglobulin abundant in colostrum is IgA in the form of secretory IgA or sIgA. Much of these are produced by plasma cells in the mammary tissue.
• So, the correct answer is 'IgA'.