Out of the following types of iron ore, a reserve of which type is largest in India?

In which of the following parts of India are the largest reserves of mineral resources found?

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

Which of the following river valleys is rich in coal reserves in India?

Which among the following is the largest mechanized mine in India?

In which of the following districts in India the largest 'Mica Belt' is found?