Task: Text Categorization
Input (English): Question: A 43-year-old man consulted for diarrheal syndrome, and reported among his background 3 pneumonias in adulthood. Which of the following immunological studies should we request ?: 
 Options:  <0> Serum immunoglobulin count and antibody production capacity test. <1> Phagocytosis test and oxidative metabolism of neutrophils. <2> Apoptosis test (programmed cell death) in the circulating lymphocytes of the patient. <3> Study of the repertoire and clonality of the T lymphocytes (alpha / beta). <4> In this patient, it would not be appropriate to request any immunological study.
Output (English): medicine