The correct match is

A) Diamond is used for cutting of glassB) Graphite is prepared by Acheson's processAcheson's process is used for the synthesis of carborundum{silicon carbide] & graphiteC) Silica exist as crystalline as well as amorphous formsCrystalline forms of silica are!) Quartz2) tridymiteCrystobaliteamorphous forms of silica are1) Agate2) Jaspar3) Onyx4)kieselghurD) In CO2 central atom carbon undergoes 'SP' hybridization in excited state