Task: Text Categorization
Input (English): Question: The recombinant DNA is: 
 Options:  <0> A DNA molecule that activates heterologous recombination. <1> A precursor messenger RNA molecule. <2> A DNA molecule composed of segments covalently linked from two or more sources. <3> A diploid DNA molecule. <4> A multienzyme complex of DNA polymerases covalently linked.
Output (English): chemistry