The diagram illustrates the routes taken by three distinct kinds of radiation, X, Y and Z. Which row correctly names X, Y and Z?
- AX: $\alpha$-particles, Y: $\beta$-particles, Z: $\gamma$-rays
- BX: $\beta$-particles, Y: $\alpha$-particles, Z: $\gamma$-rays
- CX: $\beta$-particles, Y: $\gamma$-rays, Z: $\alpha$-particles
- DX: $\gamma$-rays, Y: $\alpha$-particles, Z: $\beta$-particles