HPLC
HPLC stands for

both (a) and (b)
Highly Placed Liquid Chromatography
High Pressure Liquid Chromatography
High Performance Liquid Chromatography

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HPLC
HPLC methods include

liquid/solid (adsorption) chromatography
liquid/liquid (partition) chromatography
ion exchange and size exclusion chromatography
All of these

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HPLC
Column efficiency is measured in terms of number of plates which is

inversely related to the cube root of the peak width
directly related to the square of the peak width
directly related to the square of the peak width
inversely related to the square of the peak width

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