Task: Text Categorization
Input (English): Question: The reaction of cyclopentene with an aqueous solution of bromine at 0 ° C originates: 
 Options:  <0> trans-1,2-dibromocyclopentane. <1> cis-2-bromocyclopentanol. <2> trans -2-bromocyclopentanol. <3> trans -1,2-cyclopentanediol. <4> cis-1,2-dibromocyclopentane.
Output (English): chemistry