Rourkela, Bhilai, Bokaro, Visakhapatnam etc are centres for:

Correct option is B

The correct answer is (b) iron and steel industry.
Rourkela, Bhilai, Bokaro, and Visakhapatnam are all prominent centers for the iron and steel industry in India.
Rourkela Steel Plant: Located in Odisha, it was the first integrated steel plant in the public sector in India, established with German collaboration.
Bhilai Steel Plant: Situated in Chhattisgarh, it is one of the largest steel plants in India, set up with Soviet collaboration.
Bokaro Steel Plant: Located in Jharkhand, it was established with Soviet assistance and is known for its advanced steel production technology.
Visakhapatnam Steel Plant: Located in Andhra Pradesh, also known as Vizag Steel, is one of the major steel producers in India, known for its high-quality steel products.
Information Booster:
Cotton and Textile Industry: This industry is primarily located in regions such as Gujarat, Maharashtra, Tamil Nadu, and West Bengal, with centers like Ahmedabad, Surat, Mumbai, and Coimbatore.
Chemical Plants: Major chemical industry hubs include Vadodara, Mumbai, Chennai, and Ankleshwar.