IMSO 2019 Science International - Theory I Question 24

Question 24

An orbit is prograde when an object goes around the Sun in the same direction as the Sun rotates; the opposite direction is retrograde. Which statement is correct?

1. All planets and all comets have prograde orbits
2. All planets have prograde orbits, but some comets have retrograde orbits
3. Earth is prograde; all other planets are retrograde
4. Terrestrial planets are prograde; giant planets are retrograde