<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 4-month-old boy is brought to his pediatrician for a well-child visit. His parents have noticed that he has had poor growth compared to his older siblings. The boy was delivered vaginally after a normal pregnancy. His temperature is 98.8F 37.1C, blood pressure is 9868 mmHg, pulse is 88min, and respirations are 20min. On exam, his abdomen appears protuberant, and the boy appears to have abnormally enlarged cheeks. A finger stick reveals that the patients fasting blood glucose is 50 mgdL. On further laboratory testing, the patient is found to have elevated blood lactate levels, as well as no response to a glucagon stimulation test. What enzymatic defect is most likely present?? A: Alpha-1,4-glucosidase, B: Alpha-1,6-glucosidase, C: Glucose-6-phosphatase, D: Glycogen phosphorylase, E: Glycogen synthase,  <response>: Based on the information provided in the question stem, this appears to be a case involving hypoglycemia and abnormal glycogen metabolism in an infant. The key findings are poor growth, protuberant abdomen, enlarged cheeks, low fasting blood glucose, elevated blood lactate, and no response to glucagon stimulation test. This constellation of findings is most consistent with glycogen storage disease type I, which is caused by a deficiency in glucose-6-phosphatase. Therefore, the answer is likely to involve an enzyme involved in glycogenolysis or gluconeogenesis.C: Glucose-6-phosphatase 