Task: Text Categorization
Input (English): Question: Ophthalmological ointments: 
 Options:  <0> They may contain solid particles but only with a controlled size. <1> They do not need to be sterile. <2> They require the test of pyrogens. <3> They can not be W / O emulsions. <4> Always your excipients must be fatty
Output (English): pharmacology