Which are India's biggest mergers & acquisitions of 2021?

Piramal Group acquired Dewan Housing and Finance for nearly $4.7 billion, while Prosus' PayU announced a deal to acquire BillDesk for $4.7 billion. Adani Green Energy acquired SB Energy India for $3.5 billion, while Tata Group won the bid to acquire national carrier Air India for $2.4 billion. Zee Entertainment said it's merging with Sony Pictures in a $1.5-billion deal.