<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 46-year-old man comes to the physician because of a 6-week history of fatigue and cramping abdominal pain. He works at a gun range. Examination shows pale conjunctivae and gingival hyperpigmentation. There is weakness when extending the left wrist against resistance. Further evaluation of this patient is most likely to show which of the following?? A: Beta2 microglobulin in urine, B: White bands across the nails, C: Septal thickening on chest x-ray, D: Increased total iron binding capacity, E: Basophilic stippling of erythrocytes,  <response>: This is a clinical vignette describing a 46-year-old man with a 6-week history of fatigue, abdominal pain, pale conjunctivae, gingival hyperpigmentation, and left wrist extensor weakness. His occupation at a gun range is an important clue. The symptoms and signs described are consistent with lead toxicity. Further evaluation would likely show basophilic stippling of erythrocytes, which is a classic finding in lead poisoning. Choices A, C, and D may be seen in other conditions but are not specific findings in lead toxicity. Choice B may be seen in arsenic toxicity but not lead.E: Basophilic stippling of erythrocytes 