The planet that takes the highest time for completing a rotation is

Mercury
Venus
Earth
Pluto

The correct answer is Pluto. Pluto takes 248 Earth years to complete a rotation on its axis. Mercury takes 58.6 Earth days, Venus takes 243 Earth days, and Earth takes 24 hours.

Pluto is a dwarf planet in the Kuiper belt, located in the outermost region of the Solar System. It was discovered in 1930 and was originally classified as the ninth planet from the Sun. However, in 2006, the International Astronomical Union (IAU) reclassified Pluto as a dwarf planet because it did not meet the IAU’s definition of a planet.

Pluto is a very small planet, with a diameter of only 2,370 kilometers. It is also very cold, with an average surface temperature of -229 degrees Celsius. Pluto has a very thin atmosphere, composed mostly of nitrogen and methane.

Pluto has five moons: Charon, Nix, Hydra, Kerberos, and Styx. Charon is the largest moon, with a diameter of 1,212 kilometers. Charon and Pluto are tidally locked to each other, meaning that they always show the same face to each other.

Pluto is a very interesting planet, and scientists are still learning about it. In 2015, the New Horizons spacecraft flew by Pluto and took close-up images of the planet. These images showed that Pluto is a very complex and diverse world, with mountains, valleys, craters, and glaciers.

Pluto is a fascinating planet, and it is still being studied by scientists. It is a very different world from the other planets in the Solar System, and it is a reminder that there is still much that we do not know about our solar system.