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Q.

Brightest planet in the night sky:


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a

Jupiter

b

Venus

c

Earth

d

Mars 

answer is B.

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Detailed Solution

Concept- Because planets don't emit light and aren't self-luminous. They are bright because they return the sunlight that they receive. The brightness of a planet depends on a number of variables, including its distance from us and the predominant elements found on its surface. If we try to compare the brightness of two balls, say a metallic ball that is placed a little distance from a lantern and a rubber ball that is positioned close to the light, the metallic ball will shine even if it is far.
Hence, the correct option is 2.
 
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