Ancient History question: Which one of the following best describes Harappan drainage?

The original question-specific evidence states: Many Harappan drains were covered and carefully built as part of city planning. Covered and planned drains is the correct answer to “Which one of the following best describes Harappan drainage”. This evidence connects the required Ancient History fact with its archaeological, geographical, cultural or chronological setting. Harappan evidence must be interpreted from excavated settlements, artefacts, environmental data and comparisons among sites; a single object should not automatically support a wider claim than the evidence permits. The choices No drains at all, Wooden pipelines only and Only open ditches do not satisfy the same combination of site, feature, river region, crop, craft, discovery, chronology or cultural association. The attribution is presented as an exam-oriented historical identification and should be read within the archaeological context stated in the question. Then compare the chosen answer with the relevant NCERT theme and reject options belonging to another site or category. Replaying that method confirms Covered and planned drains as the keyed response for this Ancient History question. This evidence-led approach strengthens factual recall, chronological caution and option elimination for SSC, Railway, Banking, Defence, State and other competitive examinations.