If a mirror is placed on the line MN, then which of the answer figures will be the right mirror image of the given figure?

Appeared in: DSSSB -28 August 2019 (Shift-2)

Explanation

The question asks for a mirror image across a horizontal line (MN), which results in a vertical reflection (water image).
In a vertical reflection, the top and bottom parts of the image are interchanged, while the left and right sides remain in the same position.
The arc in the top-right corner moves to the bottom-right corner.
The stack of shapes on the left remains on the left. The bottom triangle flips to the top and inverts. The top rectangle flips to the bottom, and its diagonal () also flips to become (/).

Option A: This option fails to correctly reflect the diagonal line within the rectangle. All other elements are reflected correctly, making it a close distractor.
Option B: This option is incorrect because the main arc is not reflected vertically, and the smaller shapes have been incorrectly moved from the left to the right side.
Option C: This option is incorrect for the same reasons as Option B: the main arc is not reflected, and the smaller shapes have been moved horizontally to the right.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Visual Reasoning: Mirror and Water Images as background academic context rather than a clinical decision trigger.
While this is a non-clinical question, visual-spatial reasoning is a cognitive skill that is important in many aspects of life and professional settings.
Strong problem-solving and analytical skills, tested by such questions, are crucial for nurses in making quick and accurate decisions during patient care.
What if the mirror line MN was vertical on the right side? The image would flip horizontally. The arc would move to the top-left, and the shapes on the left would move to the right, with their internal features also flipped horizontally.

How to Approach the Question

First, identify the type of reflection. A horizontal mirror line (MN) below the figure means you need to find the 'water image' (a vertical flip).
Break down the main figure into its basic components: a large arc, a triangle, and a rectangle with a diagonal line.
Apply the vertical reflection rule (top becomes bottom, bottom becomes top, left/right stay the same) to each component individually.
Mentally construct the reflected image based on the transformation of each component.
Compare your constructed image with the given options.
Eliminate the options that have any incorrect component, and select the one that perfectly matches your expected result.

Concept Tested & Keywords

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Practise the full DSSSB -28 August 2019 (Shift-2)

Attempt every question from this paper in a timed mock, then review the full solution for each one.