Why is it difficult to differentiate between red and green colour objects in dark or in night?

Rods work well, only during daytime.

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Cones work well, only during daytime.

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Rods work well, only during night time.

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Cones work well, only during night time.

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Solution

The correct option is A Cones work well, only during daytime.
Cones operate only in bright light, hence the different type of cones (i.e., blue red or green - sensitive) are active during daytime or in presence of light. It is because of this reason, that the person is unable to differentiate green and red colour in night time.

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