Task: Question Answering
Input (English): Question: In the aromatic electrophilic substitution with a monosubstituted benzene ring, the halogens are: 
 Options:  <1> Ortho / for leaders but activating. <2> Target leaders but activating. <3> Goal / for leaders but activating. <4> Ortho / goal leaders but activating. <5> Ortho / for leaders but deactivators.
Output (English): 5