Task: Text Categorization
Input (English): Question: Which of the following factors does not influence the permeation of drugs through the stratum corneum ?: 
 Options:  <0> Degree of ionization of the drug. <1> Fixation to the tear fluid proteins. <2> Osmolarity of tears. <3> Instilled volume. <4> Ocular Pigmentation.
Output (English): pharmacology