What two advantages do the Vishakhapatnam steel plant have over the other steel plants in the public sector?

Which is the largest mineral-based industry in India? Why is it called a key or basic industry?

Why is this industry concentrated in the Chhotanagpur region? Which is the oldest and privately owned plant?

Give reason —

1. The iron and steel industry forms the backbone of Indian economy.
2. Traditional raw material have been replaced by petrochemical products.