From the center outward, which of the following lists the "layers" of the Sun in the correct order?
1. core, convection zone, radiation zone, corona, chromosphere, photosphere
2. core, radiation zone, convection zone, photosphere, chromosphere, corona
3. core, convection zone, radiation zone, photosphere, chromosphere, corona
4. core, corona, radiation zone, convection zone, photosphere, chromosphere
5. core, radiation zone, convection zone, corona, chromosphere, photosphere