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
[{'content': 'In which of the following disease, Screening procedure increases the overall survival maximum? \nSelect and explain. \nA. Prostate cancer, B. Lung cancer, C. Colon cancer, D. Ovarian cancer', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 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.', 'role': 'assistant'}]