Three uncharged capacitors are connected across a battery as shown. It is known that the energy stored in all the capacitors is same. Which of the following is not correct?

Since energy stored in the capacitors is same,

${\mathrm{C}}_2 \& {\mathrm{C}}_3$are parallel, so potential  difference across them is same 

$\frac{1}{2}{\mathrm{C}}_2{\mathrm{V}}^2=\frac{1}{2}{\mathrm{C}}_3{\mathrm{V}}^2$

$\Rightarrow {\mathrm{C}}_2={\mathrm{C}}_3$

And this parallel combination is in series with C₁.

$\frac{{\mathrm{q}}^2}{2{\mathrm{C}}_1}=\frac{1}{2}\left[\frac{{\mathrm{q}}^2}{4{\mathrm{C}}_2}\right]$

$\Rightarrow {\mathrm{C}}_1=4{\mathrm{C}}_2$