This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Definition and Concepts, Examples from NHPs, Subject name: Social & Preventive Medicine
In which of the following disease, Screening procedure increases the overall survival maximum? 
Select and explain. 
A. Prostate cancer, B. Lung cancer, C. Colon cancer, D. Ovarian cancer
C: Colon cancer
Answer: C: Colon cancer 
Explanation: Colonic cancer has highest 5-year survival rate post-screening. - This can be known by Kaplan meiyer survival analysis. - Screening of colonic cancer is done by colonoscopy. SCREENING TESTS OF OTHER OPTIONS: - Prostate cancer : Prostate specific antigen + DRE - Lung cancer : Chest x-ray - Ovarian cancer: transvaginal ultrasound (TVUS) & CA-125 blood test.