S, T and U are the aqueous chlorides of the elements X, Y and Z respectively. X, Y and Z are in the — Periodic Table and Periodicity Chemistry Question

Question

S, T and U are the aqueous chlorides of the elements X, Y and Z respectively. X, Y and Z are in the same period of the periodic table. U gives a white precipitate with NaOH but this white precipitate dissolves as more NaOH is added. When NaOH is added to T, a white precipitate forms which does not dissolve when more base is added. S does not give precipitate with NaOH. Which of the following statements are correct ?