Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: The colloidal surfaces of humus are negatively charged.
Reason R: The negative charges arise from exposed functional groups like hydroxyl, carboxylic or phenolic.
In the light of the above statements, choose the most appropriate answer from the options given below:
Both the assertion and reason are correct.
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