I’m soooo confusing with what your question is lol
Answer:
A. air pressure,this is answer.
Answer:
is the total pressure of the tank.
Explanation:
Partial pressures of nitrogen = 
Partial pressure of oxygen = 
Total pressure of gases in the tank = P
Applying Dalton's law of partial pressures :


is the total pressure of the tank.
CO2, C2H2, BeF2, XeF2, etc all these molecules have linear geometry.