A few drops of conc $H_2SO_4$ is added to the solution of $FeSO_4$ in water to

Question

(a) convert $Fe{3+}$ ions $Fe^{2+}$ ions
(b) Prevent salt hydrolysis
(c) Prevent salt hydrolysis and convert $Fe{3+}$ ions $Fe^{2+}$ ions
(d) none of these