The correct answer is Barmer - Sanchore basin.

• From Barmer - Sanchore basin area of Rajasthan, the maximum crude oil production was received in the year 2017 - 18 (up to Dec. 2017).

• Barmer - Sanchore basin 
  • Barmer-Sanchore basin is of Tertiary Age.
  • It lies in districts Barmer and Part of Jalore.
  • It is an Intracratonic type of basin.
  • The Barmer-Sanchore basin has been subdivided into 2 depressions:
    • Barmer depression in the north and
    • Sanchor depression in the south
  • In Barmer-Sanchore basin 38 oil fields have been discovered till now.
  • Important oil fields
    • Mangla,
    • Bhagyam,
    • Shakti
    • Ashwariya 
    • Saraswati,
    • Raageshwari,
    • Kaameshwari

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• Rajasthan Basin
  • Rajasthan basin has been divided into four petroleum basins.
  • These four basins are spread over in 14 Districts of Western & Eastern Rajasthan.
  • The first three petroleum basins of Rajasthan comes into the category- I, i.e. equivalent to the Bombay High, Cambay Basin and Assam, which are potential for hydrocarbons prospects.
• Bikaner - Naguar basin
  • Bikaner - Naguar basin is of Barmer-Sanchore Basin is of Tertiary Age. 
  • It covers some part of Bikaner, Nagaur, Ganganagar/Hanumangarh.
• Jaisalmer basin
  • Jaisalmer basin is of ​Mesozoic & Cenozoic age.
  • It covers Jaisalmer and Jodhpur.