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: Surgery
Lymphoedema is due to all except 
Select and explain. 
A. Lymphatic valvular insufficiency, B. Increased lymphatic contractility, C. Lymphatic obliteration by infection, D. Increased collagen formation in subcutaneous tissue
B: Increased lymphatic contractility
Answer: B: Increased lymphatic contractility 
Explanation: Decreased Lymphatic contractility is implicated in pathophysiology of Lymphoedema.