Consider the following minerals : 1. Bentonite 2. Chromite 3. Kyanite 4. Sillimanite In India, which of the above is/are officially designated as major minerals?

1. In India, minerals are classified as major minerals and minor minerals under the Mines and Minerals (Development and Regulation) Act, 1957. 2. Minor minerals are specified by the Central Government and generally include building stones, gravel, ordinary clay, ordinary sand etc. All other minerals are considered major minerals. 3. Statement 1: Bentonite is generally classified as a 'minor mineral' under the Act. (Incorrect for major) 4. Statement 2: Chromite, the ore of chromium, is a metallic mineral and is officially designated as a major mineral. (Correct) 5. Statement 3: Kyanite is an industrial mineral used in refractories and ceramics. It is officially designated as a major mineral. (Correct) 6. Statement 4: Sillimanite, similar to Kyanite, is an industrial mineral used in high-temperature applications. It is officially designated as a major mineral. (Correct) 7. Therefore, Chromite, Kyanite, and Sillimanite (2, 3, and 4) are designated as major minerals.