Jupiter takes 10 hours, Uranus takes 17 hours and Saturn takes 11 hours to complete one spin.

Answer:

Introduction:
The time it takes for a planet to complete one full orbit around the sun is known as its orbital period. This period varies for different planets based on their distance from the sun and their orbital speed. In this question, we are asked to identify which planet takes the longest time to complete one orbit around the sun.

Explanation:
To determine which planet takes the longest time to orbit the sun, we need to consider the orbital periods of the given planets: Mercury, Uranus, Jupiter, and Saturn.

Mercury:
- Mercury is the closest planet to the sun.
- It has the shortest orbital period among the given options.
- Mercury takes approximately 88 Earth days to complete one orbit around the sun.

Uranus:
- Uranus is the seventh planet from the sun.
- It has the longest orbital period among the given options.
- Uranus takes approximately 84 Earth years to complete one orbit around the sun.

Jupiter:
- Jupiter is the largest planet in our solar system.
- It has a relatively shorter orbital period compared to Uranus.
- Jupiter takes approximately 12 Earth years to complete one orbit around the sun.

Saturn:
- Saturn is known for its distinctive rings.
- It has a shorter orbital period compared to Uranus.
- Saturn takes approximately 29.5 Earth years to complete one orbit around the sun.

Conclusion:
Among the given options, Uranus takes the longest time to complete one orbit around the sun. It has an orbital period of approximately 84 Earth years, making it the planet with the slowest revolution around the sun.