Task: Text Categorization
Input (English): Question: Within the field of bacteriology, what statement is valid in relation to the phenomenon of phage conversion ?: 
 Options:  <0> It is a consequence of infection by a lytic phage. <1> It does not imply genotypic alterations. <2> It involves the lysogenization of the bacteria by a phage. <3> It does not imply phenotypic alterations. <4> It is a specialized process of conjugation.
Output (English): pharmacology