15. Which of the following sets of molecular structure are incorrect? I. selenium trioxide: T-shaped structure II. silicon tetrafluoride: tetrahedral structure III. xenon tetrafluoride: tetrahedral structure IV. arsenic pentachloride: trigonal bipyramidal structure V. nitrite ion: V-shaped structure (A) III, V (B) II, III, V (C) I, II, III,V (D) I, III (E) I, IV, V