Correct Answer - B
Electronic configuration of carbon (C ) = 2, 4 when it forms four covalent bonds by sharing its four valence electrons with hydrogen, it forms `CH_(4)` molecule like this
Now, electronic configuration of C in `CH_(4)` =2, 8
Atomic number of Ne is 10. Its electronic configuration is `underset(2,)K" "underset(8)L`
Theresore, after the formation of four bonds, carbon attains the electronic configuration of neon.