Task: Text Categorization
Input (English): Question: Capillary isotachophoresis (CITP) separates: 
 Options:  <0> Cations but can not separate anions. <1> Anions but can not separate cations. <2> Cations and anions simultaneously. <3> Cations and anions but not simultaneously. <4> Only neutral molecules.
Output (English): chemistry