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Match List - I with List - II. Choose the correct answer.
Column I
- A. Cellular barrier
- B. Cytokine barrier
- C. Physical barrier
- D. Physiological barrier
Column II
- I. Interferons
- II. Mucus
- III. Neutrophils
- IV. HCl in gastric juice
Correct answer: A → III, B → I, C → II, D → IV
Detailed Solution
Innate immunity has four barriers: physical (mucus coating of respiratory, gastrointestinal and urogenital tracts), physiological (HCl in stomach), cellular (PMNL-neutrophils) and cytokine barriers (interferons secreted by virus-infected cells).