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: Gynaecology & Obstetrics
CA - 125 is specifically associated with 
Select and explain. 
A. Colon Ca, B. Breast Ca, C. Ovarian Ca, D. Bronchogenic Ca
C: Ovarian Ca
Answer: C: Ovarian Ca 
Explanation: Ans. is c i.e. Ovarian ca CA 125 is raised in all the options given in the question but it is specific for Epithelial ovarian cancers. Tumour Epithelial cell tumour of ovary Breast carcinoma Bronchogenic carcinoma Colon carcinoma Tumour marker CA- 125 CA 18 - 9 Neuron specific enolase CEA (Carcinoembyronic Antigen