Which Reactant and Product Would Balance the Following Nuclear Reaction $\rightarrow$

Which reactant and product would balance the following nuclear reaction equation? reactant + ¹²C $\rightarrow$ ¹¹B + product

A) reactant = $\beta$ ^-, product = ¹H
B) reactant = $\beta$ ⁺, product = ¹n
C) reactant = $\beta$ ^-, product = ¹n
D) reactant = $\beta$ ⁺, product = $\alpha$
E) reactant = ¹H, product = $\alpha$