Colostrum, the yellowish fluid, secreted by mother during the initial days of lactation is very essential to impart immunity to the newborn infants because it contains :

1. Natural killer cells

2. Monocytes

3. Macrophages

4. Immunoglobulin A

Doubtly Asked 30 Oct 2026 NEET UG 2019 Practice test neet Save WhatsApp Report

1 answer

Best answer

Answer: 4. Immunoglobulin A

Colostrum is rich in antibodies, mainly IgA, which give the newborn passive natural immunity.

NK cells, monocytes and macrophages are cells, not the antibodies that protect the infant's gut, so option 4 is correct.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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