This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper limb : Miscellaneous, Subject name: Anatomy
[{'content': '37-year-old female patient has a fracture of clavicle. The junction of inner and middle third of the bone exhibits overriding of medial and lateral fragments. The arm is rotated medially, but it is not rotated laterally. Which of the following conditions is most likely to occur secondary to the fractured clavicle? \nSelect and explain. \nA. A fatal haemorrhage from the brachiocephalic vein, B. Thrombosis of subclan vein, causing a pulmonary embolism, C. Thrombosis of the subclan aery, causing an embolism in ascending aoa, D. Damage to the upper trunk of the brachial plexus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The fractured clavicle may damage the subclan vein, resulting in a pulmonary embolism; cause thrombosis of the subclan aery, resulting in embolism of the brachial aery; or damage the lower trunk of brachial plexus.', 'role': 'assistant'}]