CREATE TABLE table_75160 ("Region" FLOAT, "Group A" CLOB, "Group B" CLOB, "Group C" CLOB, "Group D" CLOB, "Group E" CLOB, "Group F" CLOB)

What is the group C region with Illinois as group B?
SELECT "Group C" FROM table_75160 WHERE "Group B" = 'illinois'
SELECT "Group C" FROM "table_75160" WHERE "Group B" = 'illinois'