Read the following short write-up and answer the questions at the end of it. The name 'silica' covers an entire group of minerals, which have the general formula SiO_(2), the most common of which is quartz. Quartz is a framework silicate with SiO_(4) tetrahedra arranged in spirals. The spirals can turn in a clockwise to anticlockwise direction-a frature that results inthere being two mirror images, optically active, varieties of quartz. The silicate anion in the mineral kionite is a chain of three SiO_(4) tetrahedra that share corners with adjacent tetrahedra. The mineral also contains Ca^(2+) ions, Cu^(2+) ions, and water molecules in a 1:1:1 ratio mineral is represented as :

Read the following short write-up and answer the questions at the end

1.	Read the following short write-up and answer the questions at the end of it. The name 'silica' covers an entire group of minerals, which have the general formula SiO_(2), the most common of which is quartz. Quartz is a framework silicate with SiO_(4) tetrahedra arranged in spirals. The spirals can turn in a clockwise to anticlockwise direction-a frature that results inthere being two mirror images, optically active, varieties of quartz. The silicate anion in the mineral kionite is a chain of three SiO_(4) tetrahedra that share corners with adjacent tetrahedra. The mineral also contains Ca^(2+) ions, Cu^(2+) ions, and water molecules in a 1:1:1 ratio mineral is represented as :
Answer» `CaCuSi_(3)O_(10).H_(2)O` `CaCuSi_(3)O_(10).2H_(2)O` `Ca_(2)CuSi_(3)O_(10).2H_(2)O` None of the above Answer :C