Answer: Option [D]The correct answer is 1992. The United Nations Conference on Environment and Development (UNCED), also known as the 'Earth Summit', was held in Rio de Janeiro, Brazil, from 3-14 June 1992.
Answer: Option [A]The correct answer is Jharkhand. Hazaribag Wildlife Sanctuary, Hazaribag also spelled Hazaribagh, national park, north-central Jharkhand state, northeastern India. The sanctuary is situated on a hilly plateau at an average elevation of 2,000 feet (600 metres), about 55 miles (90 km) north of Ranchi, the state capital.
Answer: Option [B]The correct answer is Desert National Park. Desert National Park is a national park situated in the Indian state of Rajasthan, near the towns of Jaisalmer and Barmer. The Desert National Park is an excellent example of the ecosystem of the Thar Desert. Sand dunes form around 44% of the Park.
Answer: Option [C]The correct answer is Calcium. Certain macrominerals are required in large quantities and include calcium, chloride, magnesium, phosphorous, potassium, sodium and sulphur and cobalt, copper, iodine, iron, manganese, molybdenum, selenium and zinc are required in smaller quantities and thus are microminerals.
Answer: Option [D]The correct answer is Hydrosphere. A hydrosphere is the total amount of water on a planet. The hydrosphere includes water that is on the surface of the planet, underground, and in the air. A planet's hydrosphere can be liquid, vapor, or ice. On Earth, liquid water exists on the surface in the form of oceans, lakes and rivers.