A large tank of height h is filled with a liquid of density ρ. A similar tank is half-filled with this liquid and other-halffi lled with another liquid of density 2ρ as shown. What will be the ratio of the instantaneous velocities of discharge through a small opening at the base of the tanks? (assume that the diameter of the opening is negligible compared to the height of the liquid column in either of the tanks)

• A. 2 : 3
• B. 2 : √3
• C. √2 : 3
• D. √2 : √3