\((A)\) follows first order reaction\(, (A)\to \) product. Concentration of \(A,\) changes from \(0.1M\) to \(0.025M\) in \(40\) min. Find the rate of reaction of \(A\) when concentration of \(A\) is \(0.01M\)( )
A. \(3.46\times 10^{-4}M\ min^{1}\)
B. \(3.47\times 10^{-5}M\ min^{-1}\)
C. \(1.73\times 10^{-4}M\ min^{-1}\)
D. \(1.73\times 10^{-5}M\ min^{-1}\)