Which option describes the structure of the electron shells

In a neutral carbon atom, there are 6 electrons. The configuration of these electrons is as follows:

- The inner shell (1st shell) can hold a maximum of 2 electrons, and for carbon, it is complete with 2 electrons.
- The outer shell (2nd shell) can hold a maximum of 8 electrons, and in carbon, it has 4 electrons.

Therefore, the correct option that describes the structure of the electron shells in a neutral carbon atom is:

**The inner shell is complete with two electrons. The outer shell is incomplete with four electrons.**