In which one of the following States are Namchik-Namphuk Coalfields located?

Which one of the following coalfields is not located in Jharkhand?

Famous ‘Ruhr coalfield’ is situated in which of the following countries?

At which of the following places the Copper Industry is located?

Which one of the the following is largest lignite coal field in India?

In which of the following states of India has major reserves of coal ?