A uniform capillary tube of length l and inner radius r with its upper end sealed is submerged vertically into water. The outside pressure is p, and surface tension of water is `gamma`. When a length x of the capillary is submerged into water, it is found that water levels inside and outside the capillary coincide, the value of x is

Options

A. `(l)/((l+(p_(o)r)/(4 gamma)))`
B. `l(l-(p_(o)r)/(4 gamma))`
C. `l(l-(p_(o)r)/(2 gamma))`
D. `(l)/((l+(p_(o)r)/(2gamma)))`