Figure shows the flow speed profile for laminar flow of a viscous fluid in a long cylindrical pipe. The speed is greatest along the axis and zero at the pipe walls,

We know that,$v=\frac{R^2}{\mu }\left[\frac{-dP}{dx}\right]$

where, $R=$radius of pipe

$\mu =$viscosity

So, according to the above explanation solution $3$ is correct.