The correct answer is (b). The Indian Institute of Petroleum (IIP) is a premier research institute in the field of petroleum technology and engineering. It is located in Dehradun, Uttarakhand, India. The institute was established in 1960 by the Government of India to meet the growing demand for petroleum engineers and scientists in the country. IIP offers undergraduate, postgraduate, and doctoral programs in petroleum engineering, chemical engineering, and other related fields. The institute also has a strong research focus and has made significant contributions to the development of petroleum technology in India.
The other options are incorrect. (a) Nainital is a town in the Kumaon region of Uttarakhand, India. It is a popular tourist destination known for its scenic beauty. (c) Roorkee is a city in the Haridwar district of Uttarakhand, India. It is known for its engineering colleges and is home to the Indian Institute of Technology Roorkee. (d) Mussoorie is a hill station in the Garhwal region of Uttarakhand, India. It is a popular tourist destination known for its scenic beauty and colonial architecture.