# An air bubble of radius 1 cm rises from the bottom portion through a liquid of density $1.5 g/cc$ at a constant speed of $0.250 \;cm^{-1}$.If the density of air is neglected, the coefficient of viscosity of the liquid is approximately, (In pas):

$\begin {array} {1 1} (a)\;13000 & \quad (b)\;1300 \\ (c)\;130 & \quad (d)\;13 \end {array}$

(c) 130