Definition: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
Input: Question: Which of the following antibiotics could be used in a patient with hypersensitivity to penicillin by skin tests ?: 
 Options:  <1> Piperacillin / tazobactam <2> Aztreonam <3> Ampicillin <4> Amoxicillin <5> Ceftazidime
