Which among the following has the world's largest reserves of Uranium?

Australia possesses the world’s largest known uranium reserves, estimated at roughly 1.7 million tonnes (about 28% of global resources), with major deposits such as Olympic Dam contributing to this lead. Data aggregations and industry summaries consistently place Australia ahead of other countries—Kazakhstan, Canada and Russia—in total recoverable uranium resources, while Canada and Russia hold substantially smaller shares (Canada ≈589,000 t; Russia ≈481,000 t). Independent mining and nuclear-fuel reports also corroborate Australia’s top position, reporting resource estimates around 1.68 million tonnes and emphasizing Australia’s status as the single largest uranium-reserve holder worldwide.