I league mohun bagan crowned champions

I think there may be some confusion here!

Mohun Bagan is a popular Indian football club, but I'm not aware of any league called "I League" where they have been crowned champions. The I-League is the top division of Indian football, and it's possible that Mohun Bagan has won the league title in the past, but I'd need more information to confirm.

Could you please provide more context or clarify which season or year you're referring to? I'd be happy to help you find the information you're looking for!