If \[A=\{x:{{x}^{2}}-3x+2=0\}\]and \[B=\{x:{{x}^{2}}+4x-5=0\}\] then the value of A - B is

• A. \[\{1,2\}\]
• B. {2}
• C. \[\{1\}\]
• D. {5, 2}