How many electrons are unpaired in
C

Explanation

There are 2 unpaired electrons. The carbon atom contains 6 electrons. The electronic configuration is `1s^(2), 2s^(2), 2p^(2)` or
The 1s and 2s subshells are completely filled with two electrons with both spins. In 2p subshell, 5, `6^(th)` electrons occupy two orbitals as unpaired electrons according to Hund.s rule.