Which Statement A— D Regarding Isomers in Transition Metal Compounds

Which statement A— D regarding isomers in transition metal compounds is not correct?

A) Structural isomers are compounds that have the same chemical formula but different arrangements of atoms in bonds.
B) Stereoisomers are compounds with the same chemical formula and bonding pattern, but the orientation of the atoms or groups in space differs.
C) Enantiomers are structural isomers that are mirror images and are superimposable.
D) A tetrahedral complex ion with four different ligands is chiral.
E) Statements A— D are all correct.