The reaction of \[{{A}_{2}}\] and \[{{B}_{2}}\] follows the equation \[{{A}_{2}}(g)+{{B}_{2}}(g)\to 2AB(g)\] The following data were observed\[{{[{{A}_{2}}]}_{0}}\]\[{{[{{B}_{2}}]}_{0}}\]Initial rate of appearance of \[AB(g)\,(in\,M{{s}^{-1}})\]0.100.10\[2.5\times {{10}^{-4}}\]0.200.10\[5\times {{10}^{-4}}\]0.200.20\[10\times {{10}^{-4}}\]The value of rate constant for the above reaction is:

• A. \[2.5\times {{10}^{-4}}\]
• B. \[2.5\times {{10}^{-2}}\]
• C. \[1.25\times {{10}^{-2}}\]
• D. None of these