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The potential difference between the points $P$ and $Q$ in the adjoining circuit will be :-

• A
  $\frac{{\left( {{C_1}{C_4} - {C_2}{C_3}} \right)E}}{{\left( {{C_1} + {C_3}} \right)\left( {{C_2} + {C_4}} \right)}}$
• B
  $\frac{{{C_2}{C_3}E}}{{{C_1}{C_2}\left( {{C_3} + {C_4}} \right)}}$
• ✓
  $\frac{{\left( {{C_2}{C_3} - {C_1}{C_4}} \right)E}}{{\left( {{C_1} + {C_2}} \right)\left( {{C_3} + {C_4}} \right)}}$
• D
  $\frac{{\left( {{C_2}{C_3} - {C_1}{C_4}} \right)E}}{{\left( {{C_1} + {C_2} + {C_3} + {C_4}} \right)}}$