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. These rules provide for the grant of concessions for the extraction of minor minerals, the terms and conditions of such concessions, and the penalties for contravention of the rules.
The rules define a minor mineral as any mineral other than a major mineral. Major minerals are those that are listed in the Schedule to the Mines and Minerals (Development and Regulation) Act, 1957. Minor minerals include sand, gravel, limestone, dolomite, clay, gypsum, salt, and other non-metallic minerals.
The rules provide for the grant of concessions for the extraction of minor minerals by the State Government. A concession is a permission granted by the State Government to an individual or a company to extract a minor mineral from a particular area. The terms and conditions of a concession are specified in the rules.
The rules also provide for the penalties for contravention of the rules. The penalties include imprisonment for a term not exceeding three years, or a fine not exceeding one lakh rupees, or both.
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 under the definition of minor minerals.