The pressure in a venturimeter along the distance from the inlet end goes through following changes.

a$)$ It increases till the throat, and then decreases at the downstream side of the throat

b$)$ It decreases till the throat, and then increases at the downstream side of the throat

c$)$ It decreases till the throat, and then remains unchanged with distance from the throat

d$)$ It increases till the throat, and then remains unchanged with distance from the throat

a$)$

b$)$

c$)$

d$)$