<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:You are developing a new diagnostic test to identify patients with disease X. Of 100 patients tested with the gold standard test, 10 tested positive. Of those that tested positive, the experimental test was positive for 90 of those patients. The specificity of the experimental test is 20. What is the positive predictive value of this new test?? A: 90, B: 10, C: 11, D: 95, E: 20,  <response>: To calculate the positive predictive value PPV of a test, we need to know the sensitivity, specificity, and prevalence of the disease. The sensitivity is given as 90 the experimental test was positive for 90 of patients who tested positive on the gold standard. The specificity is given as 20. The prevalence is given as 10 10 tested positive on the gold standard.To calculate PPV: PPV sensitivity x prevalence sensitivity x prevalence 1-specificity x 1-prevalenceC: 11 