Physical barrier = .............. and physiological barrier = .............

  • A
    Skin,saliva in the mouth
  • B
    Macrophage,acid in the stomach
  • C
    Respiratory tract,$PMNL$
  • D
    Urinogenital tract,$PMNL$

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The Pulse-Polio programme is organised in our country:

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Which of the following is a correct matching pair of the vector and the disease?

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