Which one from among the following planets is largest in size ?

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Earth

Venus

Mars

Mercury

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This question was previously asked in

UPSC NDA-2 – 2021

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Earth is the largest planet in size among the given options.

Comparing the approximate mean diameters of the planets listed:
– Mercury: ~4,880 km
– Venus: ~12,100 km
– Earth: ~12,740 km
– Mars: ~6,780 km

Among Mercury, Venus, Earth, and Mars, Earth has the largest diameter and is therefore the largest in size. The order from largest to smallest among these is Earth > Venus > Mars > Mercury. In the entire solar system, the planets in order of decreasing size are Jupiter, Saturn, Uranus, Neptune, Earth, Venus, Mars, and Mercury.

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