The elements $X$, $Y$ and $Z$ are consecutive and lie in the third period of the Periodic Table. Of the three, element $Y$ has both the greatest first ionisation energy and the smallest melting point. Which elements could $X$, $Y$ and $Z$ be?
- Asodium, magnesium, aluminium
- Bmagnesium, aluminium, silicon
- Caluminium, silicon, phosphorus
- Dsilicon, phosphorus, sulfur