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 swelling on both legs. Patient is pregnant (3rd trimester). Which of the following statements about the type of thrombosis that is most likely to be present in this patient is true? \nSelect and explain. \nA. Pale platelet layer alternating with dark red cell layer present, B. Incomplete lumen occlusion present, C. Grows in antegrade manner, D. It causes ischemia and infarction of organs', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]