Dielectrics in capacitors

2014 AIPMT 1 question

1. 1 Electrostatic Potential and Capacitance
   Two thin dielectric slabs of dielectric constants $K_1$ and $K_2$ ($K_1 < K_2$) are inserted between plates of a parallel plate capacitor, as shown in the figure. The variation of electric field 'E' between the plates with distance 'd' as measured from plate P is correctly shown by:
   
   A - B - C - D -
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