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Three Dimensional Geometry
NCERT Class 12
CBSE
Grade 12

Question:

Image of point $(1, 2, 3)$ in the origin is:
(a) $(-1, -2, -3)$
(b) $(1, -2, -3)$
(c) $(-1, 2, 3)$
(d) $(1, 2, -3)$

Step-by-Step Solution

Reflection across origin: $(-1, -2, -3)$. [1.0 Mark]

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🎯 Official CBSE Marking Scheme:
Selecting $(-1, -2, -3)$: 1.0 Mark

Correct Answer: $(-1, -2, -3)$
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