The average energy of a neutron produced in the fission of ${ }_{92}^{235} U$ is
- A$160 \times 10^{-13} \,J$
- B$320 \times 10^{-15} \,J$
- C$320 \times 10^{-13} \,J$
- D$160 \times 10^{-15} \,J$
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