Consider the statements: (i) diamond is the hardest natural substance and is a poor conductor; (ii) at ordinary temperature and pressure graphite is thermodynamically more stable than diamond; (iii) $\mathrm{C}{}_{60}$ dissolves in benzene; (iv) every carbon atom in $\mathrm{C}{}_{60}$ is bonded to three other carbon atoms; (v) diamond contains delocalised $\pi$ electrons. The number of correct statements is

1. AFour
2. BThree
3. CFive
4. DTwo