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Question 56Asked in RRB JE CBT-1, 19 Feb 2026, Shift 1 (9:00 AM)

What is the function of the iris in the human eye?

  1. AControls the size of the pupil
  2. BRefracts incoming light rays
  3. CTransmits signals to the brain
  4. DForms the image on the retina
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Correct answer: (A) Controls the size of the pupil

From RRB JE CBT-1 PYQ 19 Feb 2026, Shift 1 (9:00 AM)

This is question 56 of RRB JE CBT-1 PYQ 19 Feb 2026, Shift 1 (9:00 AM). 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.