Directions: The first and the last sentences of the passage are numbered 1 and 6, respectively. The rest of the passage is split into four parts named A, B, C and D. These four parts are not given in their proper order. Read the sentences and find out which of the following combinations is correct.

1. Chromatography is used to separate mixtures of substances into their components. A. Different components travel at different rates. B. The mobile phase flows through the stationary phase and carries the components of the mixture with it. C. They all have a stationary phase (a solid or a liquid supported on a solid) and a mobile phase (a liquid or a gas). D. All forms of chromatography work on the same principle.
2. In paper chromatography, the stationary phase is a very uniform absorbent paper, while the mobile phase is a suitable liquid solvent or mixture of solvents.