Question

Witch planet has completed less than one orbit of the sun in the last 100 years

Answer 1

planet Neptune

Step-by-step explanation:

Since Pluto is no longer considered a planet, the correct answer would be Neptune. It is eight and farthest known planet of the Solar system. Orbital period of planet Neptune is 168 years. So planet Neptune has completed less than one orbit around the Sun in the last 100 years.