Correct option is B
Indigo Airlines is different from the rest because it is currently operational and one of India's leading budget airlines. In contrast,
Jet Airways, Air Deccan, and Kingfisher Airlines have either ceased operations or faced significant financial difficulties.
Indigo Airlines is renowned for being India's largest airline by passenger volume, maintaining financial stability and operational efficiency.
- Jet Airways: Suspended operations in 2019 due to financial troubles but has attempted to relaunch.
- Air Deccan: Once India's pioneer low-cost carrier, it merged with Kingfisher Airlines and ceased operations.
- Kingfisher Airlines: Ceased operations in 2012 due to heavy financial losses.