Arrange the following scholars/events chronologically according to the development of ideas regarding the origin of towns: 1. Lewis Mumford 2. Henri Pirenne 3. Gordon Childe 4. Medieval urban revival

Who wrote the famous book 'Cities in Evolution'?

Given below are two statements, one labeled as Assertion (A) and the other as Reason (R): Assertion (A): Urban renewal can be a vital tool for alleviating slum conditions and stimulating the physical and economic revitalization of cities. Reason (R): Urban renewal programs in central cities are often limited by suburban resistance to integrating lower-income and racially diverse families. Select the correct answer using the codes given below: