HPLC
HPLC stands for

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

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HPLC
HPLC methods include

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

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

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

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