Which of the following diagrams (figure) depicts ideal gas behaviour?

Which of the following diagrams, Fig. depicts ideal gas behaviour ?

Which of the following graphs is consistent with ideal gas behaviour?

Which of the following graphs is inconsistent with ideal gas behaviour ? (Assume n = constant)

Which of the following graphs is inconsistent with ideal gas behaviour ? (Assume n = constant)

Gases show ideal gas behaviour at

Which of the following diagram correctly describes the behaviour of a fixed mass of an ideal gas ? ( T is measured in K ) .