Which of the following changes cannot increase the volume of a gas by 4 times ?

Given data

${\mathrm{V}}_1=\mathrm{V} {\mathrm{V}}_2=4\mathrm{V}$

${\mathrm{P}}_1=\mathrm{P} {\mathrm{P}}_2=?$

${\mathrm{T}}_1=\mathrm{T} {\mathrm{T}}_2=?$

$\frac{{\mathrm{P}}_1{\mathrm{V}}_1}{{\mathrm{T}}_1}=\frac{P_2{V}_2}{T_2}$

$\frac{\mathrm{PV}}{\mathrm{T}}=\frac{P_2{V}_2}{T_2}$

Case A :

${\mathrm{T}}_2=2\mathrm{T}, {\mathrm{P}}_2=\frac{\mathrm{P}}{2}$

$Then \frac{\mathrm{P}.\mathrm{V}}{\mathrm{T}}=\frac{\mathrm{P}}{2}\times \frac{V_2}{\mathit{2}T}$

${\mathrm{V}}_2=4\mathrm{V}$

Case B :

${\mathrm{P}}_2=\mathrm{P}; {\mathrm{T}}_2=4\mathrm{T} \mathrm{then} \frac{\mathrm{PV}}{\mathrm{T}}=\frac{{\mathrm{PV}}_2}{4\mathrm{T}}$

$\therefore {\mathrm{V}}_2=4\mathrm{V}$

Case C :

${\mathrm{T}}_2=\frac{\mathrm{T}}{2}, {\mathrm{P}}_2=\frac{\mathrm{P}}{2} \mathrm{then} \frac{\mathrm{PV}}{\mathrm{T}}=\frac{\mathrm{P}}{2}\times \frac{{\mathrm{V}}_2}{\mathrm{T}}\times 2$

${\mathrm{V}}_2=\mathrm{V}$