This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'The most common cause of delayed umbilical cord separation is \nSelect and explain. \nA. Raspbery tumour, B. Leukocyte adhesion deficiency, C. Patent urachus, D. Umbilical granuloma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Leukocyte adhesion deficiency may present with recurrent bacterial infections, defects in neutrophil adhesion, and a delay in umbilical cord sloughing. All other options given are various umbilical pathologies, but not related to delayed sloughing of cord', 'role': 'assistant'}]