most common nuclear fuels
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plutonium and thorium
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uranium and neptunium
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uranium and polonium
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uranium and thorium
D
Correct answer
Explanation
Uranium and Thorium are the two most common nuclear fuels used in nuclear reactors worldwide. Uranium-235 is the primary fuel in most reactors, while thorium is used in some advanced reactor designs and is more abundant than uranium. The other options incorrectly include elements like polonium and neptunium which are not practical nuclear fuels.