A) \[_{5}^{10}B\,\,+\,_{2}^{4}He\,\,\xrightarrow{{}}\,\,_{7}^{13}N\,\,+\,\,_{1}^{1}H\]
B) \[_{11}^{23}Na\,\,+\,_{1}^{1}H\,\,\xrightarrow{{}}\,\,_{10}^{20}Ne\,\,+\,\,_{2}^{4}He\]
C) \[_{93}^{239}Np\,\,\xrightarrow{{}}\,\,_{94}^{239}Pu\,\,+\,\,{{\beta }^{-}}+\overline{\nu }\]
D) \[_{7}^{11}N\,\,+\,\,_{1}^{1}H\,\,\xrightarrow{{}}\,\,_{6}^{12}C\,\,+\,\,{{\beta }^{-}}+\nu \]
Correct Answer: C
Solution :
In any nuclear reaction mass number and atomic number should remain conserved. Reaction satisfies this condition. Also for \[_{93}^{239}Np\], neutron to proton ratio is greater than 1.52 which makes it unstable.
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