Examples of chain silicates are
Pyroxenes
Beryl
Tortutite
None of these
As we learn
Chain Silicates -
Sharing of two oxygen atoms per tetrahedron leads to formation of a long chain
E.g. pyroxenes and asbestos
Pyroxenes share a common structure consisting of single chains of silica tetrahidral Pyroxenes that Crystallize in the monoclinic system are called clinopyroxenes & those that crystallize in the orthorhombic system are known as orthopyroxenes.
Therefore, option (1) is correct.