29The investigator developed the electrochemical biosensor for sensitive and selective detection of glucose. The obtained calibration curve for quantifying 1-100 mM glucose is y (signal) = 100 (slope, nA/mM) x x (glucose concentration, mM) + 2. The standard deviation for measuring a blank solution (i.e., without glucose) is 1.5 nA. What is the limit of quantification of glucose measured by the electrochemical biosensors? (A) 0.015 (B) 0.045 (C) 0.030 (D) 0.15 (E) 0.45.