CREATE TABLE table_79298 ("Period" TEXT, "Internet Explorer" TEXT, "Firefox" TEXT, "Chrome" TEXT, "Safari" TEXT, "Opera" TEXT, "Other" TEXT)

What internet explorer has 1.67% as the opera, with 2012 q1 as the period?
SELECT "Internet Explorer" FROM table_79298 WHERE "Opera" = '1.67%' AND "Period" = '2012 q1'
SELECT "Internet Explorer" FROM "table_79298" WHERE "Opera" = '1.67%' AND "Period" = '2012 q1'