Assertion: In urban areas way of life is complex and fast.
Reasoning: In urban areas, the social relations are more informal.

Assertion (A) is true but Reasoning (R) is not correct.

Rural and urban settlements differ in terms of social relationships, attitude, and outlook. Rural people are less mobile and therefore, social relations among them are intimate. In urban areas, on the other hand, way of life is complex and fast, and social relations are formal.