Which of the following hypothetical nuclear reactions is expected to release energy?

PHYSICS · Single correct · A Level · Physics · Nuclear physics · Nuclear physics

Problem

Which of the following hypothetical nuclear reactions is expected to release energy? (a)

\,_{20}^{40}\text{Ca}\;\rightarrow\;2\,_{10}^{20}\text{Ne}

(b)

\,_{26}^{56}\text{Fe}+\,_{26}^{56}\text{Fe}\;\rightarrow\;_{52}^{112}\text{Te}

(c)

\,_{92}^{238}\text{U}\;\rightarrow\;_{56}^{140}\text{Ba}+\,_{36}^{98}\text{Kr}

(d)

\,_{6}^{12}\text{C}\;\rightarrow\;3\,_{2}^{4}\text{He}