If the 'Mercury planet' is called 'Uranus planet', 'Uranus planet' is called 'Jupiter planet', 'Jupiter planet' is called 'Mars planet', 'Mars planet' is called 'Earth planet', 'Earth planet' is called 'Saturn planet', 'Saturn planet' is called 'Venus planet', and 'Venus planet' is called 'Pluto planet', then on which planet do we live?
1. Saturn planet
2. Earth planet
3. Mars planet
4. Venus planet