<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 45-year-old man is brought to the emergency department by ambulance after vomiting blood. The patient reports that he only ate a small snack the morning before and had not eaten anything for over 24 hours. At the hospital, the patient is stabilized. He is admitted to a surgical floor and placed on NPO with a nasogastric tube set to intermittent suction. He has been previously diagnosed with liver cirrhosis. An esophagogastroduodenoscopy EGD has been planned for the next afternoon. At the time of endoscopy, some pathways were generating glucose to maintain serum glucose levels. Which of the following enzymes catalyzes the irreversible biochemical reaction of this process?? A: Glycogen phosphorylase, B: Enolase, C: Glucose-6-phosphate dehydrogenase, D: Fructose-1,6-bisphosphatase, E: Glyceraldehyde-3-phosphate dehydrogenase,  <response>: This is a medical question asking about the enzyme that catalyzes the irreversible biochemical reaction of generating glucose to maintain serum glucose levels in a patient with liver cirrhosis who is NPO. The key points are:- Patient has liver cirrhosis - Patient is NPO - Pathways are generating glucose to maintain serum levels- Looking for irreversible enzyme in this glucose generation pathwayThis suggests gluconeogenesis - the process of generating glucose from non-carbohydrate sources. The irreversible step in gluconeogenesis is the conversion of fructose 1,6-bisphosphate to fructose 6-phosphate catalyzed by fructose-1,6-bisphosphatase.D: Fructose-1,6-bisphosphatase 