Correct Answer: (a) Keonjhar
Solution:Rourkela Steel Plant is located on the main Mumbai-Kolkata S.E. Railway line in Sundergarh district, Odisha. The Rourkela Steel Plant was set up with the help of German company Krupps and Demag. It began production in 1959. It is located near Limestone, Dolomite & Manganese ore deposits. This plant obtains iron ore from Mayurbhanj, Keonjhar, Sundergarh etc, Significantly Coal is obtained from Bokaro, Jharia & Talchar, Limestone, Dolomite from Birmitrapur, Manganese ore from Noamundi, coking coal from Kargali coal washery. This plant gets cheaper hydropower from Hirakud.