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Main functions of rods and cones in retina of vertebrate eye are:

[A].	Rods are important for vision in bright light and cones in dim light	[B].	Rods are important for vision in dim light and cones in bright light
[C].	Rods are involved in colour vision and cones in distinguishing intensities of light	[D].	Both are important for vision in dim light

Answer: Option B