Energy Stored in Capacitors

2007 AIPMT-PRE 1 question

1. 1 Electrostatic Potential and Capacitance
   Two condensers, one of capacity $C$ and other of capacity $\dfrac{C}{2}$, are connected to a V-volt battery, as shown.
   (The two condensers are connected in parallel across the battery.)
   
   The work done in charging fully both the condensers is
   A $\dfrac{1}{4}CV^2$ B $\dfrac{3}{4}CV^2$ C $\dfrac{1}{2}CV^2$ D $2CV^2$
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