Is it worth for IIM Ranchi MBA graduate with 3 year of previous work-ex in IT to join mu sigma as apprentice leader trainee?

No, I certainly will not suggest that you go for MU Sigma as an apprentice leader trainee. There are many better options like joining a structured, organized company with a decent work ambiance. These aspects are missing in MU Sigma which has a weird business model. The business model is based on the concept ‘Throw them in water, they will learn to swim”. That is if they are made to face hardships they will end up learning the skill to survive. In reality, this has caused relentless suffering to the professionals, the managers, and most importantly the clients. Everybody is clueless and no proper targets are allotted. So I am completely against you joining MU Sigma.