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Solution


Q.

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:   [2019]
1 immunoglobulin A  
2 natural killer cells  
3 monocytes  
4 macrophages  

Ans.

(1)

Colostrum (Mother's first milk) rich in immunoglobulin A (IgA) antibodies are passed to newborn through the breast feed and provides natural passive immunity.