The correct answer is Nathsagar.

• It is approximately 9,998 m long and 41.30 m high, forming a reservoir named Nath Sagar Jalashay that has a total storage capacity of 2909 MCM (million cubic meters).
• It is estimated that approximately 30% of the dam is filled with silt, reducing its life as well as storage capacity.
• Survey findings show that from 2003 to 2012, there was a loss of 31% (that is 8.08 thousand million cubic (TMC) feet) in dead storage and 14% (that is 10.73 TMC) in live storage capacity of the dam due to silt. 
• Jayakwadi project is a multipurpose project.
• The main purpose was to irrigate land for agriculture in the drought-prone Marathwada region of Maharashtra state.

Some useful information about Maharashtra:

• Formed on - 1 May 1960
• Districts - 36
• National Parks of Maharashtra -Sanjay Gandhi (Borivilli) National Park, Chandoli National Park, Gugamal National Park.
• Folk Dance of Maharashtra - Koli Dance, Lavani Dance, Povadas Dance, Tamasha, etc.
• The highest point of Maharashtra - Kalsubai