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
A 40 year old female patient complains of swelling on both the legs. Patient is pregnant (3rd trimester). Which type of thrombosis is most likely to be present in this patient? 
Select and explain. 
A. Venous, B. Arterial, C. Mural, D. Saddle
A: Venous
Answer: A: Venous 
Explanation: None