Масъала 55 аз 73

Кадом элемент $\left({ }_{Z}^{\mathrm{A}} \mathrm{X}\right)$ ба реаксияи ${ }_{\mathbf{1}}^{\mathbf{2}} \boldsymbol{H}+{ }_{Z}^{\mathrm{A}} \mathrm{X} \rightarrow{ }_{\mathbf{2}}^{\mathbf{3}} \boldsymbol{H} \boldsymbol{e}+{ }_{\mathbf{0}}^{\mathbf{0}} \boldsymbol{\gamma}$ дохил шуд?

A. ${ }_{1}^{1} H$ B. ${ }_{1}^{2} H$ C. ${ }_{2}^{4} \mathrm{He}$ D. ${ }_{1}^{3} \mathrm{H}$