A quadrilateral is a polygon with 4 number of sides and 4 vertices. The correct figure is figure B.
What is a quadrilateral?
A quadrilateral is a polygon with 4 number of sides and 4 vertices. A few examples of a quadrilateral are square, rectangle, rhombus, parallelogram, etc.
For the above-given condition, "If it is a square, then it is a quadrilateral" figure B is correct because, as per the first diagram, not all the squares are quadrilateral, while as per the figure B every square is a quadrilateral.
Hence, the correct figure is figure B.
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