DIRECTIONS: Read the following passage and answer the questions that follow :
A passage is given with five questions following it. Read the passage carefully and select the best answer to each question out of the given four alternatives.
Antarctica is a mostly unpopulated continent. It is the coldest, driest and most remote place in the world. And it is the world's only continent that does not have a native population. No single country owns the Antarctic. However a number of countries, including Argentina, Australia, Chile, New Zealand, France and the United Kingdom, have already laid claim to the Antartic and others will probably follow. In some areas of the continent, two countries claim the same land.
The Antarctic Treaty was signed in 1959 and creates the rules for the exploration of the Antarctic. The treaty forbids military activity in the Antarctic, as well as mining. Many countries, however, think that there are valuable materials and minerals locked up under the frozen Antarctic ice, In addition, the treaty bans nuclear testing as well as dumping nuclear waste. The Antarctic. Treaty was made to protect the continent and avoid further disputes.
By 2048, the treaty must be renewed. New rules and regulations could be imposed by then.
Currently, almost all of the 70 bases in the Antarctic are used for research and scientific activity. The snow–covered continent is perfect for tracking satellites and space research because it offers clear blue, cloudless skies. Climatologists are studying the development of the ozone layer with growing concern. It was here that a hole in the layer was discovered for the first time.
More than 4000 scientists operate the research stations in the Antarctic summer, while only about a thousand populate the continent during the harsh and severe winters.
Environmentalists fear that exploiting Antarctica for military and economic reasons will damage the environment. At present, there is no economic activity in Antarctica, except for cruise ships that travel around the continent. This could change, if a new treaty allows mining in the Antarctic. As mineral resources are dwindling in other areas, nations could turn to Antarctica to find and exploit valuable raw materials.
Some geologists say that there are over 200 billion barrels of oil under the Antarctic ice. At the moment getting at these reserves would be very expensive. In addition, economic experts claim that there are large amounts of coal, nickel and copper under the Antarctic ice. (SSC Sub. Ins. 2017)
Q. According to the passage, the reserves of which mineral is not found under the Antarctic ice?