The diagram shows the water levels in a water manometer which is used to measure the pressure of gas G in cm of water. (Figure is not drawn to the scale.) What is the pressure of gas G ?
A6 cm of water more than the atmospheric pressure
B8 cm of water more than the atmospheric pressure
C6 cm of water less than the atmospheric pressure
D8 cm of water less than the atmospheric pressure
i am assuming c option is correct,can you please explain me in detail