A teacher sets out the nuclide equation for a fusion reaction. $^{{2}}_{{1}}\text{H} + ^{{X}}_{{1}}\text{H} \rightarrow ^{{4}}_{{2}}Q + ^{{1}}_{{0}}\text{n}$. Which value is missing for X, and which element is represented by Q?
- AX = 2, Q = H
- BX = 2, Q = He
- CX = 3, Q = H
- DX = 3, Q = He