How many electron rings does carbon have?
Six orbits, but they aren't really moving in "rings". There are two "principal quantum numbers": two with quantum number 1 and four with quantum number 2.
The Bohr-atom concept of electron "rings" or "shells" is still used in high school chem to explain the periodic table, but do not take it too literally.
I'm sure that the intent of the question was to answer two "rings" or two shells, as DrWLS has suggested.
To determine the number of electron rings in an atom, you need to know its atomic structure. In the case of carbon, it has 6 electrons arranged in two electron rings.
The first electron ring, also known as the innermost energy level, can hold a maximum of 2 electrons. The second electron ring, or the outermost energy level, can hold a maximum of 8 electrons.
Since carbon has 6 electrons, 2 electrons will be in the first electron ring, and the remaining 4 electrons will fill the second electron ring.
To find this information, you can look up the atomic structure of carbon in a periodic table or reference material. The atomic number of carbon is 6, which tells you the number of protons (and also the number of electrons when the atom is neutral). By understanding how electron configuration works, you can determine that carbon has 2 electrons in its first electron ring and 4 electrons in its second electron ring.