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. Si_(3)O_(9)^(6-) ( having three tetrahedral units) 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. Si_(3)O_(9)^(6-) ( having three tetrahedral units) is represented as:
Answer» Both (a) and (B) NONE of these Answer :B