<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 34 year-old-male with a previous diagnosis of Graves disease presents for a check-up. Since his diagnosis 4 months ago, the patients symptoms have been relatively well-controlled with medications since starting them 3 weeks ago after an initial unsuccessful course of radioiodine ablation. The patients complete blood count reveals decreased absolute neutrophils at 450mL and a slightly decreased hematocrit of 39. Which of the following is the most likely cause of this patients abnormal laboratory results?? A: Atenolol, B: Levothyroxine, C: Methimazole, D: Complication from radioiodine ablation, E: Perchlorate,  <response>: This is a medical question about a patient with Graves disease who has abnormal lab results. The patient was initially treated with radioiodine ablation which was unsuccessful, and is now on medications. The lab results show low neutrophils and hematocrit. The question is asking about the most likely cause of these abnormal labs. Since the patient has Graves disease and is on medications now after failed radioiodine treatment, the medications are a likely cause. Specifically, methimazole is a common antithyroid medication that can cause neutropenia and anemia leading to the low neutrophil and hematocrit levels. Radioiodine can also cause cytopenias but is less likely since medications were started after that. The other choices are not medications used to treat Graves disease.C: Methimazole 