question: Q:A 33-year-old man with recently diagnosed testicular cancer visits his oncologist to discuss the treatment plan. His left testicle was removed after a thorough workup of a lump. A pelvic CT showed no enlarged lymph nodes and a simple orchiectomy and pelvic lymph node dissection was completed. The final diagnosis was stage IB non-seminoma testicular cancer (pT2N0Mn/a). A combination of different chemotherapeutic medications is recommended including bleomycin, etoposide, and cisplatin. Each of the antineoplastic drugs has a different mechanism of action; each drug targets cancer cells at a specific phase in the cell cycle and works by inhibiting a major cellular process. Which of the following enzymes would be affected by bleomycin?? 
  {'A': 'DNA polymerase β', 'B': 'DNA polymerase III', 'C': 'Thymidylate synthase', 'D': 'Ribonucleotide reductase', 'E': 'Dihydrofolate reductase'},