The given map shows a shaded area, which is indicated as the major producer of a particular agricultural product. The answer to the question is Option 1 - Cotton.

To analyze the other options:

Option 2 - Groundnut: This option is not supported by any evidence or information provided in the question or the map. There is no indication or mention of groundnut production in the shaded area on the map.

Option 3 - Wheat: Similarly, there is no reference to wheat production in the given map or question. The shaded area does not correspond to any significant wheat-producing region.

Option 4 - Mustard: Again, the map does not provide any information or depiction of mustard production. There is no correlation between the shaded area and mustard cultivation.

In conclusion, based on the given map, the shaded area is identified as the major producer of cotton, making Option 1 the correct answer.