Cyanite (Al2SiO5), quartz (SiO2), and leucite (KAlSi2O6) may be grouped together because they all contain silicon. Option D. This is further explained below.
What is Silicon?
Generally, Silicon is employed in electrical equipment because it has highly unique features. It is a semiconductor, which is one of its most essential features.
In conclusion, SIlicon is a semiconductor used in the tech industry.
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