Which of all Harappan sites, has the most impressive drainage system?

Which of all Harappan sites, has the most impressive drainage system? Correct Answer Mohenjodaro

The most striking feature of this Harappan civilization (Indus Valley Civilization) is that the Indus Valley people had constructed their drainage system on very scientific lines. The drainage system of Mohen-jo-daro is so elaborate that “the like of which has not yet been found anywhere in the world in any other city of the same antiquity".

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