This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Surgery
In CEAP classification of varicose veins , beer bottle appearance is seen in ? 
Select and explain. 
A. c1, B. c2, C. C4a, D. C4b
D: C4b
Answer: D: C4b 
Explanation: C4b - lipodermatosclerosis -subcutaneous fibrosis - beer bottle appearance is seen. ref : bailey and love 27th ed