Geometry

Question Analysis:
This tests the ability to recognize minimal conditions needed for a square.
Main focus: identifying what makes a rhombus become a square.

Key Concept Explanation:
A rhombus already has 4 equal sides.
One right angle forces all angles to be right → square.
A rectangle already has congruent opposite sides.
One pair of adjacent congruent sides forces all sides equal → square.

Step-by-Step Solution:
A) Not necessarily square – sides may differ, it might be rectangle
B) Rhombus + right angle → all right angles → square
C) Rectangle + one pair of adjacen...