The sum of \[3{{x}^{2}}+4x-2{{y}^{2}}\] and \[-{{x}^{2}}+3x-2{{y}^{2}}\] is

• A.  \[4{{x}^{2}}+x\]   
• B. \[7x+2{{x}^{2}}-4{{y}^{2}}\]
• C.  \[7x+4{{x}^{2}}-4{{y}^{2}}\]  
• D.  \[x+2{{x}^{2}}\]