dust, gas, ice small, medium, large spiral, elliptical, irregular red giant, white dwarf, supernova
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of these are scientific classifications for galaxies in the universe?
Possibilities:
- dust, gas, ice
- small, medium, large
- spiral, elliptical, irregular
- red giant, white dwarf, supernova

spiral, elliptical, irregular