From the following solids which are polyhedron.

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Cone

Cylinder

Prism

Pyramid

answer is C.

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Detailed Solution

Given different solids, we need to tell which of them is a polyhedron.
We know that a polyhedron is defined as a 3D shape with flat polygonal faces.
Cone is a 3D shape with bottom circular, body curved, and one apex.
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So, it is not a polyhedron.
Cylinder is a 3D shape with top and bottom circular and curved body.
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So, it is not a polyhedron.
Prism is a 3D solid object in which the two ends are identical and prism is the combination of the flat faces, identical bases, and equal cross-sections.
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So, it is a polyhedron.
Pyramid is a 3D shape and has a polygonal base, flat triangular faces and it is formed by connecting the bases to an apex.
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So, it is a polyhedron.
Hence, options (3) and (4) are correct.

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