Compounded ratio of (x + y):(x - y), \[\left( {{\mathbf{x}}^{\mathbf{2}}}+\text{ }{{\mathbf{y}}^{\mathbf{2}}} \right)\text{ }:\text{ }{{\left( \mathbf{x}+\text{ }\mathbf{y} \right)}^{\mathbf{2}}}\mathbf{and}\text{ }\left( {{\mathbf{x}}^{\mathbf{2}}}-\text{ }{{\mathbf{y}}^{\mathbf{2}}} \right)\text{ }:\text{ }\left( {{\mathbf{x}}^{\mathbf{4}}}-\text{ }{{\mathbf{y}}^{\mathbf{4}}} \right)\]is:

• A. (x + y) : 1
• B. (x - y) : (x + y)
• C. \[(1 : \left( {{x}^{2}}- {{y}^{2}} \right)\]
• D. \[\left( {{x}^{2}}+ {{y}^{2}} \right) : \left( {{x}^{2}}- {{y}^{2}} \right)\]
• E. None of these