If a 2nd order reaction has the rate equation $R = k[A][B]$, and the rate constant, $k= 3.67\;M^{-1}s^{-1}$, $[A]$ is $4.5\;M$ and $[B]$ is $99\;M$, what is the rate constant of its pseudo-1st-order reaction?

Question

$\begin{array}{1 1} 363.33\;s^{-1} \\16.515\;s^{-1} \\ 1634.985\;s^{-1} \\ 181.665 \;s^{-1} \end{array}$