Question: 167. 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?
(1) Acquired Immunity
(2) Innate Immunity
(3) Cell-mediated Immunity
(4) Humoral Immunity
Answer: Option (2)
Explanation:
Innate immunity is the immunity present in the human body from the time of birth.
It provides a non-specific defence mechanism, meaning it acts against a wide range of pathogens.
Innate immunity includes physical barriers like skin, physiological barriers like stomach acid, cellular barriers like phagocytes, and cytokine barriers.
Acquired immunity develops after birth and is specific to particular pathogens.
Cell-mediated immunity and humoral immunity are types of acquired immunity.
Therefore, the correct answer is Innate Immunity.