The platelets are drifting with the blood flowing in a streamline flow through a horizontal artery as shown below. Artery is contracted in region II. Choose the correct statement.
A
As the platelets enter a constriction, the platelets get squeezed closer together in the narrow region and hence the fluid pressure must rise there.
B
As the platelets enter a constriction, pressure is lower there.
C
The artery's cross section area is smaller in the constriction and thus the pressure must be larger there because pressure equals the force divided by area.
