Consider the following statements: I. In diamond, each carbon atom...

(I, II) In diamond, hybridisation of carbon is $s p^3$ and graphite has planar hexagonal layer of $\mathrm{C}$-atoms. The hybridisation of each $\mathrm{C}$-atom in graphite is $s p^2$. (III) Silicones are organo-silicon polymers formed from inorganic and organic monomer having chemical formula \left(R_2 \mathrm{SiO}\right)_n$, due to non-polar alkyl group, silicones are water repelling in nature. (IV) The catenation tendency in group 14 elements decreases due to decrease in element bond strength. Thus, the correct order is$\mathrm{C}$>>$\mathrm{Si}$>$\mathrm{Ge} \approx \mathrm{Sn}$Hence, statement (IV) is incorrect. Thus, option (a) is correct.$