The correct answer is A. filtration and chromatography.
Both filtration and chromatography can separate mixtures based on particle size, although they operate on different principles. Filtration directly separates solid particles from liquids or gases, while chromatography can separate components based on their movement through a medium, which can also relate to particle size.
Option B (filtration and evaporation) does not involve separation by particle size, as evaporation is used to separate dissolved solids from liquids. Option C (distillation and evaporation) primarily separates substances based on boiling points, not particle size. Option D (distillation and chromatography) also does not focus on particle size separation specifically.