In solid chlorine the $\mathrm{Cl}-\mathrm{Cl}$ distance within a molecule is $199\mathrm{pm}$, while the shortest distance between chlorine atoms of two neighbouring molecules is $332\mathrm{pm}$. The van der Waals radius of chlorine derived from these data is:

1. A99.5$\mathrm{pm}$
2. B199$\mathrm{pm}$
3. C166$\mathrm{pm}$
4. D332$\mathrm{pm}$