All four of the listed Central Acts have relevance to or bearing on biodiversity conservation in India.

The Import and Export (Control) Act, 1947, is relevant to biodiversity conservation because it regulates the import and export of goods, including endangered species and their products. The act also provides for the conservation of foreign exchange by regulating the export of certain goods.

The Mining and Mineral Development (Regulation) Act, 1957, is relevant to biodiversity conservation because it provides for the regulation of mines and mineral development activities to ensure environmental protection, conservation of forests, and the prevention of ecological damage.

The Customs Act, 1962, is relevant to biodiversity conservation because it regulates the import and export of goods, including endangered species and their products. The act also provides for the prevention of smuggling of goods and the protection of intellectual property rights.

The Indian Forest Act, 1927, is relevant to biodiversity conservation because it provides for the conservation, management, and development of forests, as well as the regulation of forest produce and the prevention of forest offenses.

Therefore, the correct option is: 1, 2, 3, and 4.