Which row contains a transition element?
- Amelting point $44\,^{\circ}\text{C}$, density $1.82\,\text{g cm}^{-3}$
- Bmelting point $181\,^{\circ}\text{C}$, density $0.53\,\text{g cm}^{-3}$
- Cmelting point $271\,^{\circ}\text{C}$, density $9.75\,\text{g cm}^{-3}$
- Dmelting point $1244\,^{\circ}\text{C}$, density $7.20\,\text{g cm}^{-3}$