The correct option is Maharashtra.
Explanation
The Tapi (or Tapti) River is one of the major rivers of Peninsular India and flows in a rift valley towards the west. It originates near Multai in the Betul district of Madhya Pradesh. The river basin covers an area of approximately 65,145 sq. km.
The distribution of the Tapi river basin among the states is as follows:
- Maharashtra: Holds the largest share, covering approximately 79% of the total basin area (about 51,504 sq. km).
- Madhya Pradesh: Accounts for approximately 15% of the basin area.
- Gujarat: Accounts for the remaining 6% of the basin area.
Rajasthan does not form part of the Tapi river basin.
Key Takeaway: While the Tapi River originates in Madhya Pradesh and flows into the sea through Gujarat, the vast majority of its catchment area lies within the state of Maharashtra.