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NEET 2025 · BiologyPrevious Year Question

Which of the following type of immunity is present at the time of birth and is a non-specific type of defence in the human body?

Answer: (D) Innate Immunity. Answer: (D) Innate Immunity.

  1. A.Cell-mediated Immunity
  2. B.Humoral Immunity
  3. C.Acquired Immunity
  4. D.Innate Immunity✓

Correct Answer

(D) Innate Immunity

Solution & Explanation

Answer: (D) Innate Immunity. Solution: Innate immunity is the non-specific type of defence that is present at the time of birth, accomplished through physical, physiological, cellular and cytokine barriers to the entry of foreign agents. Why not the others: Acquired immunity is pathogen-specific and develops after exposure (not present at birth). Humoral (antibody-mediated) and cell-mediated immunity are the two specific components of acquired immunity, so they are also specific and acquired — not the innate, present-at-birth, non-specific defence asked for. NCERT Reference: NCERT Ch7, p.134, lines 32-34: "non-specific type of defence, that is present at the"

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