Consider a liquid at rest in a container which opens into atmosphere. At any point A at a depth h below the surface of the liquid,
(i) the gauge pressure at point A is `rho gh.`
(ii) the gauge pressure at point a is `P _(a)+rhogh.`
(iii) The pressure at point A is `rhogh.`
(iv) The pressure at point A is Pa `+ rho gh. `
The correct alternative is