Discussion
Darkest level of the associated color (RGB) would have brightness value equal to
Answer: A
In an eight bit RGB image each colour channel takes values from 0 to 255, where 0 means no light and 255 means full brightness. The darkest level of a colour is therefore 0, which is black in that channel. The value 256 lies outside the range of an 8-bit channel, 255 is the brightest level and not the darkest, and 2047 is the top of an 11-bit scale, so none of them is the darkest level. Black in an RGB display means all three channels are at the minimum, so the darkest level of any one colour channel is the value 0 in 8-bit data.
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