Chromatographic techniques are separation techniques used in biochemistry. The chromatographic techniques can separate a sample into components depending on the differences in solubility of different components in different solvents. Some of the examples of commonly used chromatographic techniques are paper chromatography, thin layer chromatography, gas chromatography, gas-liquid chromatography and high performance liquid chromatography (HPLC). HPLC is carried out at high pressure to obtain better resolution ie better separation.
So, the correct answer is 'High performance liquid chromatography'