Task: Text Categorization
Input (English): Question: Which of the following analytical determinations is less useful for decision making in the follow-up and control of an HIV-infected person? 
 Options:  <0> CD4 lymphocyte count in peripheral blood. <1> Quantification of immunoglobulin. <2> Measurement of viral load. <3> Studies of HIV resistance to antiretroviral drugs. <4> Analysis of the co-receptor tropism.
Output (English): medicine