Two solids dissociate as follows;\({\rm{A}}\left( {\rm{s}} \right)\rightleftharpoons{\rm{B}}\left( {\rm{g}} \right) + {\rm{C}}\left( {\rm{g}} \right);{{\rm{K}}_{{{\rm{p}}_1}}} = {\rm{x\;at}}{{\rm{m}}^2}\)\({\rm{D}}\left( {\rm{s}} \right)\rightleftharpoons{\rm{C}}\left( {\rm{g}} \right) + {\rm{E}}\left( {\rm{g}} \right);{{\rm{K}}_{{{\rm{p}}_2}}} = {\rm{y\;at}}{{\rm{m}}^2}\)The total pressure when both the solid dissociate simultaneously is

• A. \(\sqrt {\rm{x}} + {\rm{y\;atm}}\)
• B. \({{\rm{x}}^2} + {{\rm{y}}^2}{\rm{\;atm}}\)
• C. (x + y) atm
• D. \(2\left( {\sqrt {\rm{x}} + {\rm{y}}} \right){\rm{atm}}\)