Four samples are placed as spots on chromatography paper. It is known that one of these samples is pure compound Q. A separate spot of pure compound Q is also put onto the paper. The paper is then put into a solvent. The diagram shows the chromatogram obtained. Which statement is correct?
- ASample 2 has travelled the furthest and sample 3 is pure compound Q.
- BSample 3 has travelled the furthest and sample 2 is pure compound Q.
- CSample 4 has travelled the furthest and sample 1 is pure compound Q.
- DSample 4 has travelled the furthest and sample 2 is pure compound Q.