JEE Main 2018 Physics question

A parallel plate capacitor of capacitance 90 pF is connected to a battery of emf 20 V. If a dielectric material of dielectric constant is inserted between the plates, the magnitude of the induced charge will be :

• (A)1.2 nCCorrect
• (B)0.3 nC
• (C)2.4 nC
• (D)0.9 nC