A cylinder containing water up to a height of `25cm` has a hole of cross-section `1/4 cm^(2)` in its bottom. It is counterpoised in a balance. What is the initial change in the balancing weight when water begin to flow out?
A. Increase of `12.5 gm - wt`
B. Increase of `6.25 gm-wt`
C. Decrease of `12.5 gm-wt`
D. Decrease of `6.25 gm-wt`
