The correct answer is: Sand, gravel, and other minor minerals.
The Manipur Minor Mineral Concession Rules, 2016 regulate the extraction of minor minerals in the state of Manipur. Minor minerals are defined as minerals other than major minerals, which are coal, lignite, petroleum, natural gas, iron ore, manganese ore, chrome ore, bauxite, copper ore, lead-zinc ore, nickel ore, gold ore, silver ore, diamond, precious stones, and radioactive minerals.
The rules provide for the grant of concessions for the extraction of minor minerals, the terms and conditions of such concessions, and the fees and royalties payable for the extraction of minor minerals. The rules also provide for the regulation of the mining operations, including the safety of the workers and the environment.
The rules are applicable to all persons who extract minor minerals in the state of Manipur, whether they are individuals, companies, or government agencies. The rules are enforced by the Department of Mines and Geology, Government of Manipur.
The rules have been amended several times since they were first notified in 2016. The most recent amendment was notified in 2020.
The rules are important because they regulate the extraction of minor minerals in the state of Manipur. The rules ensure that the extraction of minor minerals is carried out in a sustainable manner and that the interests of the people of Manipur are protected.
The other options are incorrect because they do not fall within the definition of minor minerals.