If 50 gm oleum sample rated as 118% is mixed with 18 gm water, then the correct option is (a) The resulting solution contains 18 gm of water and 118 gm HSO4 (b) The resulting solution contains 9 gm water and 59 gm HSO4 (c) The resulting solution contains only 118 gm pure HSO4 (d) The resulting solution contains 68 gm of pure HSO4