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Question

Retina is composed of

  1. Cones only
  2. Rod only
  3. Rods and cones
  4. Rods, cones and neuroganglion cells.

A
Cones only
B
Rod only
C
Rods and cones
D
Rods, cones and neuroganglion cells.
Solution
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The correct option is D Rods, cones and neuroganglion cells.
The retina is the third and inner layer of the eye which is a light-sensitive layer of tissue. The retina is composed of light-sensitive neurons arranged in three layers; the first layer is made up of rods and cones and the other two kinds of cells transmit impulses from the rods and cones to the optic nerve (neuroganglion cells). The rods are sensitive in dim light, and the cones are sensitive in bright light and are responsible for color vision.
So, the correct answer is option D.

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