question: Q:While performing a Western blot, a graduate student spilled a small amount of the radiolabeled antibody on her left forearm. Although very little harm was done to the skin, the radiation did cause minor damage to the DNA of the exposed skin by severing covalent bonds between the nitrogenous bases and the core ribose leaving several apurinic/apyrimidinic sites. Damaged cells would most likely repair these sites by which of the following mechanisms?? 
  {'A': 'Nucleotide excision repair', 'B': 'Base excision repair', 'C': 'Mismatch repair', 'D': 'Nonhomologous end joining repair', 'E': 'Homologous recombination'},