Which of these is the largest producer of Uranium in the world-U.S.A., France, India, Zaire?

Answer 1

"Uranium is distributed worldwide. The world's largest single uranium deposit is located at the Olympic Dam Mine in South Australia. Australia has the world's largest uranium reserves — 40 percent of the planet's known supply. Almost all the uranium is exported, but under strict International Atomic Energy Agency safeguards to satisfy the Australian people and government that none of the uranium is used in nuclear weapons. Australian uranium is used strictly for electricity production.
In spite of Australia's huge reserves, Canada remains the largest exporter of uranium ore, with mines located in the Athabasca Basin in northern Saskatchewan. Cameco, the world’s largest, low-cost uranium producer accounting for 18% of the world’s uranium production, operates three mines in the area.
There are also significant ore finds in Sweden but it is currently not legal to exploit them.
U.S mining has been in a slump due to the presence of former weapons material available for reprocessing into fuel; the stockpiles of former Soviet uranium and the CES countries' need for dollars; and the start of production at huge high-grade uranium mines in Canada are depressing the market price." [1]

"Australia¹s resources ... are just under 30% of the world¹s total, Canada's are 12%. Although it has more than any other country, there are others with significant uranium resources. In order they are: Kazakhstan (16% of world total), Canada, USA, South Africa, Namibia, Brazil, Niger and Russia..." [2]

So the real answer to your question is: none of the above.

Answer 2

According to the WNA Market Report, in 2005, the largest was Canada, but to answer your question...of the four you listed, the USA was the largest.