This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
[{'content': 'What tissue from the implanting embryo directly interfaces with the endometrial connective tissue? \nSelect and explain. \nA. Inner cell mass, B. Extra embryonic mesoderm, C. Epiblast, D. Syncytiotrophoblast', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]