The drag co$-$efficient for a bacterium moving in water at $1$ mm$/$s$,$ will be of the following order of magnitude $($assume size of the bacterium to be $1$ micron and kinematic viscosity of water to be $10-6$m$2/$s$).$

$24000$

$24$

$0\mathrm{.}24$

$0\mathrm{.}44$