The correct statements from below are:

(I) ${\mathrm{H}}_3{\mathrm{BO}}_3$ is a liquid
(II) ${\mathrm{H}}_3{\mathrm{BO}}_3$ forms a layer structure
(III) In ${\mathrm{H}}_3{\mathrm{BO}}_3,$ each ${\mathrm{BO}}_3$ unit is joined by hydrogen bonds
(IV) ${\mathrm{H}}_3{\mathrm{BO}}_3$ is tribasic.

Identify the correct statements from the following:

a) Silicones are hydrophobic in nature. 

b) The repeating unit in silicones is

c) In a ${\mathrm{C}}_{60}$ molecule, twenty ${\mathrm{C}}_6$ rings and twelve ${\mathrm{C}}_5$ rings are present. 

d) Dehydration of formic acid by concentrated ${\mathrm{H}}_2{\mathrm{SO}}_4$ at ${100}^o\mathrm{C}$ gives ${\mathrm{CO}}_2$. 

e) The distance between two layers in graphite is $34 \mathrm{pm}$. 

Match the following

The correct match is: