Consider an extended object immersed in water contained in a plane through. When seen from close to the edge of the through, the object looks distorted because.

Options

A. the apparent depth of the points close to the edge are nearer the surface of the water compared to the points away from the edge
B. the angle subtended by the image of the object at the eye is smaller than the actual angle subtended by the object in air
C. some of the points of the object far away from the edge may not be visible because of total internal relfection
D. water in a trough acts as lens and magnifies the object

Explanation

When immersed object is seen from close to the edge of the trough the object looks distorted becauses the apparent depth of the close are nearer the surface of the water compared to the points away from the edge.
The angle substended by the image of the object at the eye is smaller than the actual angle substended by the object in air and some of the points of the object for away from the edge may not be visible becauses of total reflection