ReNEET 2026 · Biology · Q171Human Health and DiseaseIn our bank: Exact match · 97%
Colostrum, secreted by the mother during the initial days of lactation, is abundant in ________.
- A.IgG
- B.IgM
- C.IgA✓
- D.IgD
Correct Answer
(C) IgA
Solution & Explanation
The yellowish colostrum secreted in the first days of lactation is rich in the antibody IgA, which protects the newborn's gut (a form of passive immunity). (IgG, by contrast, crosses the placenta to give natural passive immunity before birth.)
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