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
The most common cause of delayed umbilical cord separation is 
Select and explain. 
A. Raspbery tumour, B. Leukocyte adhesion deficiency, C. Patent urachus, D. Umbilical granuloma
B: Leukocyte adhesion deficiency
Answer: B: Leukocyte adhesion deficiency 
Explanation: 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