If the water source is placed along X-Y, as shown in the figure, which of the…

Step 1: Understand the rule for a water image: The top and bottom parts of the figure interchange, but the left and right sides remain in the same position.
Step 2: Observe the arrow at the top-left of the original figure. In the water image, it will invert and appear at the bottom-left, pointing downwards. This immediately eliminates Options A and B.
Step 3: The triangle at the bottom-left will move to the top-left. Both C and D have this.
Step 4: Compare the remaining options C and D by checking the inner jagged shape inside the square. In the original figure, it has a sharp point directed towards the top-left. In the water image, this point must direct towards the bottom-left. Option D shows this correct inversion, while Option C does not.

Final Answer: Option D