<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .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 apurinicapyrimidinic 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,  <response>: This is a question about DNA repair mechanisms. The stem describes a scenario where a student was exposed to radiation, which caused damage to the DNA in her skin cells by breaking covalent bonds between nitrogenous bases and ribose sugars, leaving apurinicapyrimidinic sites. The question asks which DNA repair mechanism would most likely be used to repair this type of damage.Choice A describes nucleotide excision repair, which repairs bulky lesions like pyrimidine dimers. This would not apply here since the damage was broken covalent bonds.Choice B describes base excision repair, which repairs small lesions like missing bases. This would apply here since the damage left apurinicapyrimidinic sites where bases were severed from the backbone. Choice C describes mismatch repair, which repairs errors during DNA replication. This does not apply here since the damage was caused by radiation, not replication errors. Choice D describes nonhomologous end joining, which repairs double strand breaks. The stem does not indicate any double strand breaks occurred. Choice E describes homologous recombination, which uses a homologous template to repair double strand breaks. Again, no double strand breaks are indicated.B: Base excision repair 