The correct option is 2 only, as Mica is indeed found in abundance in Kodarma, which is known for its extensive mica mines, especially in Jharkhand, India. Statement 1 is incorrect because natural gas is primarily associated with sedimentary rock formations rather than the Gondwana beds, which are older and more associated with coal deposits. Statement 3 is also incorrect; while petroleum is found in the Dharwar rock system, it is not particularly famous for it compared to other regions like the Assam and Mumbai basins. Understanding these geological contexts is crucial for the UPSC Prelims, as they assess knowledge of natural resources and their geographical distribution across India.