Task: Text Categorization
Input (English): Question: If metallic copper is added to a solution of iron (III) chloride, it produces: 
 Options:  <0> A precipitate of copper (II) chloride. <1> A solution of copper (II) chloride and iron (II) chloride. <2> A precipitate of iron (II) chloride. <3> A precipitate of metallic iron. <4> A solution of copper (I) chloride and iron (II) chloride.
Output (English): chemistry