**Category:** Inorganic Chemistry  
**Subtype:** Chemical Reactions  
**Problem Description:** This problem involves the reaction of sodium hydroxide (NaOH) with iron(II) sulfate (FeSO₄) and iron(III) sulfate (Fe₂(SO₄)₃) to form a precipitate (X). The precipitate is then reacted with excess nitric acid (HNO₃), leading to the formation of a solution containing various iron and sodium nitrate salts. The task is to identify the correct composition of the resulting solution from the given options.