The correct answer is (d), Jodhpur.
The Desert Plantation and Research Centre is located in Jodhpur, Rajasthan, India. It was established in 1962 by the Indian Council of Agricultural Research (ICAR) to undertake research on the development of drought-tolerant crops and technologies for the arid and semi-arid regions of India. The centre has made significant contributions to the development of drought-tolerant varieties of wheat, barley, sorghum, pearl millet, and chickpea. It has also developed technologies for water conservation, soil and water management, and crop production under saline and alkaline conditions. The centre’s research has helped to improve the productivity of agriculture in the arid and semi-arid regions of India and has contributed to the food security of the country.
The other options are incorrect.
(a) Jaipur is the capital of Rajasthan. It is a major tourist destination and is known for its palaces, forts, and temples.
(b) Kota is a city in Rajasthan. It is known for its steel industry and is home to the Indian Institute of Technology Roorkee.
(c) Jhalawar is a city in Rajasthan. It is known for its handicrafts and is home to the Jhalawar Fort.