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

Immunoglobulin A

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Natural killer cells

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Monocytes

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Macrophages

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Solution

The correct option is A Immunoglobulin A
The milk produced by the mother in the first few days after the delivery is called colostrum.

This milk is a yellowish fluid which is rich in antibodies like Ig A (Immunoglobulin A).

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The yellowish fluid secreted by the mother during her initial days of lactation is called: [1]

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