The correct answer is (a) Chitranjan.
Diesel Locomotive engines are manufactured in India at Chitranjan Locomotive Works (CLW), a public sector undertaking under the Ministry of Railways. CLW is located in Chittaranjan, West Bengal, India. It was established in 1950 and is one of the largest locomotive manufacturers in India. CLW manufactures a wide range of diesel locomotives, including broad gauge, meter gauge, and narrow gauge locomotives. It also manufactures electric locomotives and diesel multiple units.
The other options are incorrect.
(b) Jamshedpur is the location of Tata Steel, a steel manufacturing company.
(c) Varanasi is a city in Uttar Pradesh, India. It is known for its temples and ghats.
(d) Chennai is a city in Tamil Nadu, India. It is the capital of Tamil Nadu and the fourth most populous city in India.