Three women, R, S and T, two men, U and V, and four children, W, X, Y and Z, are going to a game. They have a total of nine seats for the game, but the seats are in three different sections of the arena; they have a group of three adjacent seats in each section. For the game, the nine people must divide into groups of three according to the following restrictions.
(i) No adults of the same sex can be together in any group.
(ii) W cannot be in R’s group.
(iii) X must be in a group with S or U or both.
Which of the following must be true?