question_answer

The\[_{92}{{U}^{238}}\]absorbs a thermal neutron. The correct sequence of radioactive decay, is [A]\[_{92}{{U}^{238}}{{+}_{0}}{{n}^{1}}{{\to }_{92}}{{U}^{239}}\xrightarrow[{{\frac{^{t}1}{2}}^{-23\,\min }}]{{}}93\,N{{p}^{239}}+{{\beta }^{-}}\] [B] \[_{93}N{{p}^{239}}{{\xrightarrow[{{\frac{^{t}1}{2}}^{-2-3day}}]{{}}}_{24}}P{{u}^{293}}+{{\beta }^{-}}\] [C] \[_{94}P{{u}^{239}}\xrightarrow[\begin{smallmatrix}  by\,thermal\,neutron \\  \left( {{\frac{^{t}1}{2}}^{-24.000\,yrs}} \right) \end{smallmatrix}]{fissionable}{{\,}_{92}}{{U}^{235}}+\alpha \]is shown by

A)  A and B          

B)  B and C

C)  C and A          

D)  all of these