Among the following,the correct statement is:

Fog is an example of which type of colloid?

When excess of electrolyte is added to a colloid,it

What modification can you suggest in the Hardy-Schulze law?

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: Finest gold is red in colour,as the size of the particles increases,it appears purple then blue and finally gold.
Assertion $R$: The colour of the colloidal solution depends on the wavelength of light scattered by the dispersed particles.
In the light of the above statements,choose the most appropriate answer from the options given below:

$A$ micelle formed during the cleansing action by soap is