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(C) When a viscous fluid flows through a cylindrical tube in a streamline manner (laminar flow),the velocity of the fluid layers is maximum at the cen

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(C) When a viscous fluid flows through a cylindrical tube in a streamline manner (laminar flow),the velocity of the fluid layers is maximum at the center of the tube and zero at the walls due to the no-slip condition.This results in a parabolic velocity profile,where the velocity $v$ at a distance $r$ from the axis is given by $v = v_{max} (1 - r^2/R^2)$,where $R$ is the radius of the tube.Diagram $C$ correctly represents this parabolic distribution,showing the highest velocity at the center and zero velocity at the boundaries.

$A$ viscous fluid is flowing through a cylindrical tube. The velocity distribution of the fluid is best represented by the diagram

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