This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Screening, Subject name: Social & Preventive Medicine
[{'content': 'Two screening tests in series will increase \nSelect and explain. \nA. Sensitivity alone, B. Specificity alone, C. Both Sensitivity and Negative predicative value, D. Both Specificity and Positive predicative value', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Condition 1 Condition 2 Test A,B,C,D,E (Screening Test in series ) Test A | B | C | D | E ** | Specificity & PPV | Sensitivity & NPV (Screening test in Parallel) (Together) * | A B C D E (Together) ** | Sensitivity & NPV | Specificity & PPV', 'role': 'assistant'}]