Q. The only planet whose period of rotation is longer than the period of revolution around the sun?
Answer: Venus
Notes: Venus is the only planet whose period of rotation is longer than the period of revolution around the Sun. One day on Venus lasts as long as 243 Earth days (the time it takes for Venus to rotate or spin once). Venus makes a complete orbit around the sun (a year in Venusian time) in 225 Earth days.

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