The shape of water in a capillary tube open at both the ends is?
In option (A) and (D), the surface tension water and capillary cancelling each other (net surface tension is zero) and only force exist there is !!mg!!. So water can't stay in tube in this shape.
In option (B), the direction of net surface force is in the same direction of !!mg!!. Therefore, this shape also not possible.
In option (C), direction of net surface tension and !!mg!! is opposite. Therefore, water shape will be !!(C)!!