A U-tube of uniform cross-section as shown in figure is partially filled with a liquid . Another liquid which does not mix with liquid is poured into one side. It is found that the liquid levels of the two sides of the tube are the same, while the level of liquid has risen by 2 cm. If the specific gravity of liquid is 1.1, the specific gravity of liquid must be
(A) 1.12
(B) 1.1
(C) 1.05
(D) 1.0
