4. Which of the following statement is INCORRECT for gas chromatography detectors?
(A) Thermal conductivity detectors respond to the thermal conductivity difference between analyte and carrier gas.
(B) Thermal conductivity detectors respond to all analytes.
(C) Flame ionization detectors generate signal by burning the analyte, generating electrons.
(D) For thermal conductivity and flame ionization detectors, detector response is proportional to analyte concentration.
(E) Flame ionization detectors are used only with inorganic compounds.