Which planet is sometimes called Uranus's twin? Saturn Pluto Jupiter Neptune

Neptune.

Because the size, mass, composition and rotation of Neptune and Uranus are very similar they're sometimes refered to as planetary twins.

Answer: Neptune

Explanation: There are a bunch of physical, chemistry and geographic properties that ubicates to neptune as twin with uranus, for example The size, mass, composition and rotation of Uranus and Neptune are extremely similar.

Inclusive you can find investigation of the NASA that proof the similarity between this beautiful planets.