Task: Text Categorization
Input (English): Question: Regarding the stability of the drugs of a proteinaceous nature of biotechnological drugs, we can say: 
 Options:  <0> Which is strongly dependent on pH. <1> That is little affected by ionic strength. <2> That being generally so high does not usually give problems in the formulation. <3> That its maximum value occurs at the pH value of lower solubility. <4> That has a slight dependence on the temperature.
Output (English): pharmacology