A.SELECTXM, SA, SD FROM STUD WHERE BETWEEN 20<SA<23
B.SELECTXM, SA, SD FROM STUD WHERE SA BETWEEN 23 AND 20
C.SELECTXM, SA, SD FROM STUD WHERE SA NOTBETWEEN20 AND 23
D.SELECTXM, SA, SD FROM STUD WHERE SA BETWEEN 20 AND 23