Option 1: Earth and Mars - This is incorrect. Asteroids do not revolve between Earth and Mars. Earth and Mars have their own orbits around the Sun.

Option 2: Mars and Jupiter - This is the correct answer. Asteroids are located in the asteroid belt, which is found between Mars and Jupiter. This region is where most of the known asteroids in our solar system are located.

Option 3: Jupiter and Saturn - This is incorrect. While there are some asteroids located beyond Jupiter in the outer reaches of the solar system, they do not revolve specifically between Jupiter and Saturn.

Option 4: Saturn and Uranus - This is incorrect. Asteroids are not found between Saturn and Uranus.

In conclusion, asteroids revolve round the Sun in between Mars and Jupiter, which is option 2.