IIM Lucknow is one of the older IIMs and therefore has a stronger alumni base. IIMs mostly specialize in Core Management and Investment Banking. So before you consider taking Sustainable Management look up at the figures and campus records.
Sustainable Management is only beneficial if at the end of the program you have formed professional colleagues or have come up with a business idea.
Currently, Sustainable Development lacks the demand and credibility enjoyed by other domains. So it’s a risky choice and should be considered only if you are serious about it or don’t have any other options.