Which of the following statement is correct?

In fluorocarbons fluorine atoms acquire negative charging due to difference in electro negativities of carbon and fluoride. Because of negative charge on fluorine atoms in fluoro carbons there exist intermolecular repulsions. In hydrocarbons the C – H bonds are less polar due to less difference in electro negativities of carbon and hydrogenThe chemical inertness and stability of fluorocarbons may be largely due toi) High C – F bond energyii) Absence of any suitable acceptor orbital at F (or C) to initiate hydrolytic attack.iii) Higher electro negativity of F leaves the C atoms in slightly oxidized state (acquiring d+ charge) while in hydrocarbons the C atoms are rather in a reduced state (d-charge)iv) The size of the F atom being slightly larger than that of H – atom, F atoms act as a shield to the C - atom