To solve this question, the user needs to have knowledge of our solar system and the number of planets in it.

Option A: This option is incorrect because there are only 8 planets in our solar system, not 11.

Option B: This option is correct. There are 9 planets in our solar system, including Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and the dwarf planet Pluto. However, in 2006, the International Astronomical Union (IAU) redefined the criteria for what constitutes a planet, and reclassified Pluto as a "dwarf planet." Therefore, there are currently only 8 planets in our solar system.

Option C: This option is incorrect because there are 8 planets in our solar system, not 11 or 8.

Option D: This option is incorrect because there are only 8 planets in our solar system, not 10.

The Answer is: C.