Which of the following is paramagnetic?

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(D) According to Molecular Orbital Theory $(MOT)$,the electronic configuration of $O_2$ ($16$ electrons) is: $\sigma 1s^2, \sigma^* 1s^2, \sigma 2s^2,

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$O_2$

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(D) According to Molecular Orbital Theory $(MOT)$,the electronic configuration of $O_2$ ($16$ electrons) is: $\sigma 1s^2, \sigma^* 1s^2, \sigma 2s^2, \sigma^* 2s^2, \sigma 2p_z^2, \pi 2p_x^2 = \pi 2p_y^2, \pi^* 2p_x^1 = \pi^* 2p_y^1$. Since $O_2$ contains two unpaired electrons in the $\pi^*$ antibonding orbitals,it exhibits paramagnetic behavior. In contrast,$N_2$ ($14$ electrons),$H_2$ ($2$ electrons),and $Li_2$ ($6$ electrons) have all paired electrons,making them diamagnetic.

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