HPLC
Dwell volume is defined as

the volume of solvent contained in a liquid chromatographic column
none of these
the volume of the column between the point at which solvents are mixed and the beginning of the column
the time required for the gradient to reach the column

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HPLC
HPLC stands for

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

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