A: Micelles are formed by surfactant molecules above the critical micelle Concentration (CMC).
R: The conductivity of a solution having surfactant molecules decreases sharply at the CMC.

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Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are true and (R) is not the correct explanation of (A)

(A) is true but (R) is false

Both (A) and (R) are false

answer is B.

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Detailed Solution

The critical micelle concentration (CMC) in colloidal systems is the level of surfactant concentration above which micelles form and any further addition of surfactants to the system produce micelles
Conductivity drops at the critical micellar concentration (CMC) as a result of micelle formation due to aggregation of surfactant molecules, which results in an effective decrease in the amount of free ions available to conduct electricity

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