Q. Chhota Nagpur plateau is called the heart of industrial India because it is :

Explanation by: Mr. Dubey

The Chhota Nagpur Plateau, spread across Jharkhand, parts of Odisha, Chhattisgarh, and West Bengal, is called the "heart of industrial India" because:
It is rich in mineral resources, especially coal, iron ore, bauxite, and mica.
It also has abundant power resources like coal and hydroelectric potential, which are essential for running industries.
This mineral wealth has led to the growth of several major industries, especially iron and steel plants (e.g., in Jamshedpur, Bokaro, and Durgapur).
Why not the others?
(A) Near to major iron and steel centres – True, but those centres exist because of the mineral richness.
(B) A big link of roads and railways – Helps industry, but is not the primary reason.
(D) Very fertile for industrial crops – The plateau is not known for agricultural fertility.
So, the main reason is: (C) rich in minerals and power fuels.