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Effective capacitance of parallel combination of
\( \mathrm{P} \) two capacitors \( C_{1} \) and \( C_{2} \) is \( 10 \mu \mathrm{F} \). When these

W capacitors are individually connected to a voltage source of \( 1 \mathrm{~V} \), the energy stored in the capacitor \( \mathrm{C}_{2} \) is 4 times that of \( C_{1} \). If these capacitors are connected in series, their effective capacitance will be:
(A) \( 1.6 \mu \mathrm{F} \)
(B) \( 3.2 \mu \mathrm{F} \)
(C) \( 8.4 \mu \mathrm{F} \)
(D) \( 4.2 \mu \mathrm{F} \)
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