Directions: The following question consists of a starting statement S1 and an ending statement S6 (both given in the beginning). The middle four sentences have been removed and jumbled up. These are labelled P, Q, R and S. Find out the proper order for the four sentences from the given options.
S1 : Urban problems differ from state to state and city to city. S6 : There is no underground drainage system in most cities, and the narrow historical roads are already congested. P : Most of the cities have neither water nor the required pipelines. Q : The population in these cities has grown beyond the planners' imagination. R : However, certain basic problems are common to all cities. S : Only broad macro-planning was done for such cities, without envisaging the future growth and this has failed to meet the requirements.