Explain why the double-bonded nitrogen in indazole accepts a proton more readily than the other nitrogen.

• A. Because the lone pair of electrons of double-bonded nitrogen is unhybridized that is why this nitrogen is more readily protonated.
• B. The lone pair of electrons in the single-bonded nitrogen is involved in aromatic conjugation, therefore, the double-bonded nitrogen is more easily protonated.
• C. Due to less steric hindrance, the double-bonded nitrogen is more readily protonated.
• D. Because the lone pair of electrons of single-bonded nitrogen is sp³ hybridized that is why this nitrogen is not readily protonated.

Answer: (B)