The parallel combination of two air filled parallel plate capacitors of capacitance C and nC is connected to a battery of voltage, V. When the capacitors are fully charged, the battery is removed and after that a dielectric material of dielectric constant K is placed between the two plates of the first capacitor. The new potential difference of the combined system is:

• A. \(\frac{{nV}}{{K + n}}\)
• B. V
• C. \(\frac{V}{{K + n}}\)
• D. \(\frac{{\left( {n + 1} \right)V}}{{K + n}}\)