A concave mirror is placed in a horizontal table with its axis vertically upward.let O be the pole & C be center 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
a)real & located at a point between C &O
b)real &will be at C
C)real & located at point between C & infinity
d)virtual & located at a point between C& O
