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
C.E.A. (Carcinoma embryonic antigen) is elevated in all except - 
Select and explain. 
A. Alcoholic Cirrhosis, B. Ca-colon, C. Ulcerative Colitis, D. Emphysema
D: Emphysema
Answer: D: Emphysema 
Explanation: Ans. is 'd' i.e., Emphysema