The largest reserves of uranium are found in

Australia
Canada
Kazakhstan
South Africa

The correct answer is (c), Kazakhstan.

Kazakhstan has the largest uranium reserves in the world, followed by Canada and Australia. South Africa has the fourth largest uranium reserves.

Kazakhstan’s uranium reserves are estimated to be 190,000 tonnes, which is about 40% of the world’s total. Canada’s uranium reserves are estimated to be 130,000 tonnes, which is about 27% of the world’s total. Australia’s uranium reserves are estimated to be 70,000 tonnes, which is about 15% of the world’s total. South Africa’s uranium reserves are estimated to be 50,000 tonnes, which is about 10% of the world’s total.

Uranium is a radioactive metal that is used to generate electricity in nuclear power plants. It is also used in the production of nuclear weapons.