<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A male newborn is delivered at term to a 30-year-old woman. Pregnancy and delivery were uncomplicated. At birth, the umbilical cord is noted to be large. When the newborn cries, straw-colored fluid leaks from the umbilicus. The external genitalia appear normal. Which of the following is the most likely cause of this newborns symptoms?? A: Abnormal fusion of the urethral folds, B: Failed closure of the vitelline duct, C: Failed obliteration of an allantoic remnant, D: Infection of the umbilical cord stump, E: Malformation of the medial umbilical ligament,  <response>: This is a question about identifying the most likely cause of symptoms in a newborn baby. The key symptoms are a large umbilical cord and leakage of straw-colored fluid from the umbilicus when the baby cries. This indicates there is likely an abnormal connection between the umbilicus and another structure. Choice A about abnormal urethral fusion can be ruled out, as the external genitalia are described as normal. Choices D and E about umbilical cord issues are less likely, as the fluid leakage suggests a connection to another structure. Choices B and C about failure of normal fetal structure closureobliteration are most plausible. Specifically, choice C about a remnant allantoic duct best fits the symptoms described.C: Failed obliteration of an allantoic remnant 