Yes, you are correct. The maximum number of hybrid orbitals a carbon atom can form is 4. This is because carbon has 4 valence electrons. Each valence electron can combine with an orbital from another atom to form a bond. In order to form 4 bonds, carbon needs 4 available orbitals. By hybridizing its 3 p orbitals and its 1 s orbital, carbon can create 4 identical hybrid orbitals called sp3 orbitals. These sp3 orbitals are then able to form 4 sigma bonds with other atoms.
