A screening test done in an area with a population of 1000, showed 90 of them positive for diabetes.  The Gold standard diagnostic test done showed 100 as positive for diabetes.  Calculate the sensitivity of the screening test?
Ref. Foundations of Community medicine. Page. 385
True positive (a) = 90 False negative(c) = 10 Sensitivity = a/(a+c) = 90/100
90/100
900/1000
110/100
110/100