Task: Text Categorization
Input (English): Question: For a drug to permeate through the cornea, you must: 
 Options:  <0> Be totally ionized. <1> Present a very high polarity. <2> Join the lysozyme that is present in the tear fluid. <3> Present a certain lipophilicity and a minimum degree of water solubility. <4> Have weak acid character.
Output (English): pharmacology