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
Buerger’s Disease is 
Select and explain. 
A. Also known as Thromboangitis Obliterans, B. Segmental inflammatory disease, C. Affects small and medium arteries in upper and lower extremities, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: BUERGER'S DISEASE (THROMBOANGITIS OBLITERANS)
→ Segmental inflammatory disease, affecting small and medium sized arteries in upper and lower extremities.
→ Inflammatory process involves neighboring veins and nerves.
→ Definite relationship with smoking.
Histopathology
→ Sharply segmental acute and chronic vasculitis of small and medium vessels with thrombosis of lumen, which may undergo organization and recanalization.
→ Thrombus contains microabsecess

Inflammatory process extends to involve neighboring veins and nerves.
With time, all three structures (artery, vein and nerve) become incased in fibrous tissue.

Clinical Features (RIM)
→ Characterized by triad of intermittent claudication, Raynaud's phenomenon and migratory superficial vein thrombophlebitis.

Typically seen in young (<40 years), male smokers.