HPLC
HPLC stands for

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

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
inversely related to the cube root of the peak width

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