Correct gas equation is

• A.  \[\frac{{{V}_{1}}{{T}_{2}}}{{{P}_{1}}}=\frac{{{V}_{2}}{{T}_{1}}}{{{P}_{2}}}\]                         
• B.  \[\frac{{{P}_{1}}{{V}_{1}}}{{{P}_{2}}{{V}_{2}}}=\frac{{{T}_{1}}}{{{T}_{2}}}\]  
• C.  \[\frac{{{P}_{1}}{{T}_{2}}}{{{V}_{1}}}=\frac{{{P}_{2}}{{V}_{2}}}{{{T}_{2}}}\]         
• D.         \[\frac{{{V}_{1}}{{V}_{2}}}{{{T}_{1}}{{T}_{2}}}={{P}_{1}}{{P}_{2}}\]