Two identical parallel plate capacitors are connected in series to a battery of 100\[V\]. A dielectric slab of dielectric constant 4.0 is inserted between the plates of second capacitor. The potential difference across the capacitors will now be respectively [MP PMT 1992]

• A.                    50 V, 50 V                       
• B.            80 V, 20 V
• C.                    20 V, 80 V                       
• D.            75 V, 25 V