IUPAC name of is:
Potassium trioxalatoferrate
The explanation for the correct option:
Option(C): Potassium trioxalatoferrate
The explanation for incorrect option(s):
Option(A): Potassium dioxalatoferrate
Option(B): Potassium dioxalatoferrate
Option (D): Potassium dioxalatoferrate
Therefore, the IUPAC name for is Potassium trioxalatoferrate.