The correct answer is (d) Chhattisgarh.
Chhattisgarh is a state in central India. It is the 10th largest state in India by area and the 17th most populous state. The capital of Chhattisgarh is Raipur.
Chhattisgarh is a major producer of groundnut. In 2019-20, Chhattisgarh produced 2.5 million tonnes of groundnut, which was about 10% of the total production in India. The per hectare yield of groundnut in Chhattisgarh is about 1,500 kg, which is higher than the national average of about 1,200 kg.
The main reason for the high per hectare yield of groundnut in Chhattisgarh is the use of high-yielding varieties of groundnut. The state government has also been promoting the use of improved agricultural practices, such as drip irrigation and use of fertilizers, to increase the productivity of groundnut.
The other options are incorrect because they are not major producers of groundnut. Uttar Pradesh is the largest producer of groundnut in India, but the per hectare yield of groundnut in Uttar Pradesh is about 1,000 kg, which is lower than the national average. West Bengal and Punjab are not major producers of groundnut.