A plane mirror is placed at the bottom of the tank containing a liquid of refractive index \[\mu \]. P is a small object at a height h above the mirror. An observer O-vertically above P outside the liquid see P and its image in the mirror. The apparent distance between these two will be

• A.            \[2\mu h\]
• B.            \[\frac{2h}{\mu }\]
• C.            \[\frac{2h}{\mu -1}\]
• D.            \[h\,\left( 1+\frac{1}{\mu } \right)\]