Which of the following technique is applied in mixing two ingredients of unequal quantities?

Geometric dilution is a technique used in mixing two ingredients of unequal quantities, in which one starts with the smallest quantity and adds an equal quantity of the ingredient having the larger amount; the process continues until all of the ingredients are used.
Blending is the act of combining two substances.
Levigation is the trituration of a powder drug with a solvent, in which the drug is insoluble with the solvent. Speculation is mixing powders using a spatula in a mortar, an ointment slab, or a plastic bag; it is a process applied when ingredients may liquefy on mixing; there is no reduction in particle size.