Q.

Which of the following is a polyhedron?


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a

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b

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c

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d

All the given 

answer is B.

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Detailed Solution

A polyhedron is a solid 3-D object with many flat faces or surfaces.
Option 1 is a 2-D figure. So it is not a polyhedron.
Option 3 uses a 3-D figure without a face.
Option 2 is a 3-D figure with flat faces.
Because its faces are congruent and regular polygons, the cuboid is a polyhedron. Its vertices are also produced by the same number of faces.
Question ImageHence, option 2 is correct.
 
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Which of the following is a polyhedron?