[Verified Answer]: Which statement is true regarding penicillins

Which statement is true regarding penicillins? Select all that apply. One, some, or all responses may be correct. geoquad They are the safest antibiotics available. geoquad The principal adverse effect of penicillins is allergic reaction. geoquad function is severely impaired. geoquad A patient who is allergic to penicillin always has a cross-allergy to cephalosporins. geoquad Confident Not Sure