<prompt> Which of the following Beta lactam can be used in an individual who is allergic to penicillin?ImipenemCarbenicillinAztreonamTicarcillin  <response>: Aztreonam is a monobactam contains single B-lactamase ring and is the onlly beta lactam antibiotic that can be used in patients of penicillin hypersensitivity as cross allergy is not seen with it. 