CREATE TABLE table_26910 ("Codename  ( main article ) " TEXT, "Brand name  ( list ) " TEXT, "Cores" FLOAT, "L3 Cache" TEXT, "Socket" TEXT, "TDP" TEXT, "I/O Bus" TEXT)

What i/o buses are associated with the LGA 1155 socket, a code name of Sandy Bridge (desktop) and a brand name of Core i3-21xx?
SELECT "I/O Bus" FROM table_26910 WHERE "Socket" = 'LGA 1155' AND "Codename (main article)" = 'Sandy Bridge (Desktop)' AND "Brand name (list)" = 'Core i3-21xx'
SELECT "I/O Bus" FROM "table_26910" WHERE "Brand name (list)" = 'Core i3-21xx' AND "Codename (main article)" = 'Sandy Bridge (Desktop)' AND "Socket" = 'LGA 1155'