The correct answer is: A. PQSR
The first sentence, S1, states that urban problems differ from state to state and city to city. This is followed by the second sentence, P, which states that most of the cities have neither water nor the required pipelines. This is a specific example of an urban problem. The third sentence, Q, states that the population in these cities has grown beyond the planners imagination. This is another specific example of an urban problem. The fourth sentence, R, states that however, certain basic problems are common to all cities. This is a general statement about urban problems. The fifth sentence, S, states that only broad macro-planning done for such cities, without envisaging the future growth, and this has failed to meet the requirements. This is a specific example of how urban problems are not being addressed. The sixth sentence, S6, states that there is no underground drainage system in most cities, and the narrow historical roads are already congested. This is another specific example of an urban problem.
The correct sequence of the sentences is:
- S1: Urban problem differ from State to State and city to city.
- 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 done for such cities, without envisaging the future growth, and this has failed to meet the requirements.
- S6: There is no underground drainage system in most cities, and the narrow historical roads are already congested.
The other options are incorrect because they do not follow the logical flow of the text.