Which of the following is a good nuclear fuel?

The correct option is D

$Plutonium-$$239$

1. A nuclear reactor that creates more fissile material than it consumes will be an efficient nuclear reactor.
2. Therefore, it requires an initial charge of fissile material.
3. To have this initial charge $Plutonium-$$239$ is the best nuclear fuel among the given material.

Hence, option D is the correct answer.