Three liquids of densities p1, p2 and P3 (with P1 > P2 > P3), having the same value of surface tension T, rise to the same height in three identical capillaries. The angles of contact θ1, θ2, and θ3, obey
(a) π/2 > θ1 > θ2 > θ3 ≥ 0
(b) 0 ≤ θ1 < θ2 < θ3 < π/2
(c) π/2 < θ1 < θ2 < θ3 < π
(d) π > θ1 > θ2 > θ3 ≥ π/2
