Greetings!
______________________________________
Answer:
[tex]OH^{-1}[/tex]
WHY IS OPTION A NOT POLYATOMIC?
The polyatomic ions are those ions which has more than two atoms involved such as the other options than OH^-1 in the question. The OH^-1 ion is the diatomic ion because it has only 2 atoms
______________________________________
HOPE IT HELPS!
