4. About the shape and geometry of molecules, which of the following descriptions is incorrect? (A) The Cl-Sn-CI bond angle in SnCl2 is smaller than 120°. (B) XeF4 is a square planar molecule. (C) In carbonyl fluoride COF2, the F-C-F angle is larger than the O-C-F angle. (D) CIF3 has a T-shaped structure. (E) In XeOF4, no F atom is trans to the O atom.