If an element X of an atomic number Z and mass number Y is irradiated by an intense concentration of neutrons, the relevant nuclear equation is?

• A ^y_zX + ¹₀n → ^{y - 1}_{z + 1}X
• B ^y_zX + ¹₀n → ^{y + 1}_zX
• C ^y_zX + ¹₀n → ^y_{z + 1}X
• D ^y_zX + ¹₀n → ^{y + 1}_{z - 1}X