Two circular plates of radius $5\;cm$ each , have a $0.01 \;mm$ thick water film between them . What will be the force required to separated the plates (surface tension of water = 73 dynes /cm)

Question

$\begin{array}{1 1} 125\;N \\ 95\;N \\ 115\;N \\ 105\;N \end{array} $