Radioactivity — practice question

Sodium-24 undergoes decay to magnesium-24 as represented by the equation: $^{24}_{11}\text{Na} \rightarrow ^{24}_{12}\text{Mg} + \text{emitted particle}$. Which particle is emitted?

• A$\alpha$-particle
• B$\beta$-particle
• Cneutron
• Dproton