Question

The part of human eye which controls the amount of light entering into it is:

• A. Iris
• B. Cornea
• C. Ciliary muscles
• D. Pupil
  {5pt}

Hint:

The iris is a colored part of the eye and controls the dilation and constriction of the pupil to control light intake.

Answer 1

The Correct Option is A

Step 1: Identifying the structure. The iris is the part of the human eye that controls the size of the pupil and, in turn, regulates the amount of light entering the eye. 
Step 2: Conclusion. Thus, the correct answer is option (A): Iris.