Масъала 286 аз 305

Реаксияи алфа-кохиши бор ${ }_{5}^{\mathbf{1 1}} \boldsymbol{B}$-ро нишон дихед.

A. ${ }_{5}^{11} \mathrm{~B} \rightarrow{ }_{2}^{4} \mathrm{He}+{ }_{3}^{7} \mathrm{Li}$ B. ${ }_{5}^{11} B \rightarrow{ }_{-1}^{0} e+{ }_{6}^{11} C$ C. ${ }_{5}^{11} B \rightarrow{ }_{1}^{1} P+{ }_{4}^{10} B e$ D. ${ }_{5}^{11} B \rightarrow{ }_{+}^{0} e+{ }_{4}^{11} B e$