Correct Answer: (a) Bihar has been the leading producer of coal and mica.
Solution:When this question was asked, Bihar was the leading producer of coal and Mica. However, after the formation of the Jharkhand state the scenario had changed. The separate state of Odisha was carved out of Bihar in 1936. After the formation of Jharkhand, Bihar does not border with Odisha. Bihar has a bicameral legislature.