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The yellowish fluid "colostrum" secreted by mammary glands of mother during the initial days of lactation has abundant antibodies (lgA) to protect the infant. This type of immunity is called as :

(1) Autoimmunity

(2) Passive immunity

(3) Active immunity

(4) Acquired immunity

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Answer (2) Passive immunity

Sol. Option (2) is correct answer as colostrum is first milk, yellowish fluid secreted by mammary glands of mother during initial days of lactation. It contains IgA antibodies to protect the infants. Such type of immunity in which readymade antibodies reach the body of infants, is called natural passive immunity.

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