NEET (UG) 2023 — Question 70

Pyridine has the formula $\ce{C5H5N}$ and an aromatic six-membered ring containing one nitrogen atom. The six ring atoms give 6 $\sigma$ bonds; the five carbons each carry one H, adding 5 C-H $\sigma$ bonds, so total $\sigma$ bonds = 11. The aromatic sextet contains 3 $\pi$ bonds. The nitrogen atom has one lone pair, which is not part of the aromatic sextet. Thus the values are 11 $\sigma$, 3 $\pi$, 1 lone pair, i.e., option B.