Task: Text Categorization
Input (English): Question: Iron deficiency anemia is treated with oral or parenteral preparations: 
 Options:  <0> Only ferrous salts should be used orally. <1> Only ferric salts should be used orally. <2> Orally, the most appropriate form is the iron-dextran complex. <3> Orally, the treatment should last a maximum of fifteen days. <4> Only ferrous salts should be used parenterally.
Output (English): pharmacology