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

Option: 1

Active immunity

Option: 2

Acquired immunity

Option: 3


Option: 4

Passive immunity

Answers (1)



  • In Passive immunity, the Antibodies are directly inserted in the body
  • Colostrum is the first milk to infants after birth.It consists of IgA 
  • Thus this is Passive immunity 
  • This is a natural phenomenon and hence it is Acquired Natural Passive immunity
  • Hence, the correct option is (d).
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