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A concave mirror is placed on a horizont...

A concave mirror is placed on a horizontal table with its axis vertically upward. Let O be the pole of the mirror and C be the cenre of curvature. A point object placed at C, froms real image at C. if the mirror is now filled with water, the image will be

A

real and remain at C.

B

real and located at a point between C an infinity.

C

virtal and located at a point between C and O.

D

real and located at a point between C and O.

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