WHICH_OF_THE_FOLLOWING_IS_NOT_THE_CHARACTERISTIC_OF_CHOPPER_AMPLIFIER_PH_METER??$

• A. Direct voltage from the electrodes is chopped at the main frequency
• B. Using choppers for high-input resistance gives rise to spikes of waveforms at the output
• C. It leads to stability in DC output of phase-sensitive rectifier
• D. Magnitude of surge increases in the glass electrode output