Which civilization had underground drainage system?

Which civilization had underground drainage system?

کس تہذیب میں زیر زمین نکاسی آب کا نظام تھا؟
Explanation

The Indus Valley Civilisation (IVC), additionally referred to as the Indus Civilisation changed into a Bronze Age civilization withinside the northwestern areas of South Asia, lasting from 3300 BCE to 1300 BCE, and in its mature shape from 2600 BCE to 1900 BCE.