Statement-I: The electrostatic force between the plates of a charged isolated capacitor decreases when dielectric fills whole space between plates.
Statement-II: The electric field between the plates of a charged isolated capacitance decreases when dielectric fills whole space between plates.

(A) Statement-I is true, statement-II is true and statement-2 is correct explanation for statement-I.
(B) Statement-I is true, statement-II is true and statement-II is not the correct explatnation for statement-I.
(C) Statement-I is true, statement-II is false.
(D) Statement-I is false, statement-II is true.