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Question 66Asked in RRB ALP CBT-1, 17 Feb 2026, Shift 2 (12:30 PM)

The cilia in the upper respiratory tract primarily help in:

  1. AAbsorbing oxygen
  2. BGas exchange
  3. CPumping blood to lungs
  4. DRemoving harmful particles from inhaled air
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Correct answer: (D) Removing harmful particles from inhaled air

From RRB ALP CBT-1 PYQ 17 Feb 2026, Shift 2 (12:30 PM)

This is question 66 of RRB ALP CBT-1 PYQ 17 Feb 2026, Shift 2 (12:30 PM). See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.