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: Pathology
[{'content': 'A 40 year old female patient complains of breathlessness. Patient is pregnant (3rd trimester) and is on bed rest. This patient is under- \nSelect and explain. \nA. High risk for thrombosis, B. Low risk for thrombosis, C. Risk for primary thrombosis, D. No risk for thrombosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]