Two tubes of same length and diameters \(4 \mathrm{~mm}\) and \(8 \mathrm{~mm}\) are joined together to form a U-shaped tube open at both the ends. If the U-tube contains water, then the difference between the levels of water in the two limbs of the tube is
(Surface tension of water at the temperature of experiment is \(7.3 \times 10^{-2} \mathrm{Nm}^{-1}\), angle of contact \(=0^{\circ}\), density of water \(=1.0 \times 10^3 \mathrm{~kg} \mathrm{~m}^{-3}\) and acceleration due to gravity \(=10 \mathrm{~ms}^{-2}\) )

1. A \(3.65 \mathrm{~mm}\)
2. B \(36.5 \mathrm{~mm}\)
3. C \(0.365 \mathrm{~mm}\)
4. D \(365 \mathrm{~mm}\)