If one of the line represented by the equation \[a{{x}^{2}}+2hxy+b{{y}^{2}}=0\] is coincident with one of the line represented by \[{a}'{{x}^{2}}+2{h}'xy+{b}'{{y}^{2}}=0\], then

• A. \[{{(a{b}'-{a}'b)}^{2}}=4(a{h}'-{a}'h)\,(h{b}'-{h}'b)\]
• B. \[{{(a{b}'+{a}'b)}^{2}}=4(a{h}'-{a}'h)\,(h{b}'-{h}'b)\]
• C. \[{{(a{b}'-{a}'b)}^{2}}=(a{h}'-{a}'h)\,(h{b}'-{h}'b)\]
• D. None of these