MCQ
A concave mirror is placed on a horizontal table with its axis directed vertically upwards. Let $O$ be the pole of the mirror and $C$ its centre of curvature. A point object is placed at $C.$ It has a real image, also located at $C.$ If the mirror is now filled with water, the image will be
- AReal, and will remain at $C$
- BReal, and located at a point between $C$ and $\infty $
- CVirtual and located at a point between $C$ and $O$
- ✓Real, and located at a point between $C$and $O$


