What is the charge on the iron cations in Iron(II) Chloride and Iron(III) Chloride?

The iron cation's charge is shown by the roman numbers that follow its name.
The Roman numeral after the name of the metal denotes the charge when identifying ionic compounds that comprise metal ions capable of producing more than one type of cation.

Iron(||)chloride's iron cation therefore has a charge of 2⁺, whereas iron(|||)chloride's iron cation has a charge of 3⁺.
The Roman numeral after the name of the metal denotes the charge when identifying ionic compounds that comprise metal ions capable of producing more than one type of cation. Iron(||)chloride's iron cation therefore has a charge of 2⁺, whereas iron(|||)chloride's iron cation has a charge of 3⁺.

Inorganic coordination chemists have been inspired to create and research new iron cation containing carboxylate complexes by the methane monooxygenase enzyme, which catalyses the oxidation of methane to methanol, and the ribonucleotide reductase enzyme, which catalyses the oxidation of a tyrosinase residue to a tyrosyl radical.

Hence, option A is correct.