Iron exhibits `+2 and +3` oxidation states. Which of the following statements about iron is incorrect?

Iron exhibits +2 ang +3 oxidation States. Which of the following Statements about iron is incorrect ?

Iron exhibits +2 and +3 oxidation states. Which of the following about iron is incorrect?

An iron ring is heated. Which of the following statement about it is incorrect?

Oxidation state of iron in haemoglobin is-

Iron exhibits +2 and +3 oxidation states Write their electronic configuration. Which will be more stable? Why?