Pick out the correct statement.
(1) $\mathrm{SF}_{4}$ is a gas and has regular tetrahedral structure
(2) $\mathrm{SF}_{6}$ in highly unreactive towards hydrolysis
(3) In $\mathrm{SF}_{6}$, 'S' atom is in the state of $\mathrm{sp}_{3} \mathrm{~d}_{2}$ hybridisation
(4) The oxides of fluorine are properly called oxygen fluorides
(a) $1,2,3$
(b) $2,3,4$
(c) $1,3,4$
(d) $1,2,4$