Which Harappan site gives the evidence of wooden carved drain?

→ Kalibangan is a major Harappan site in Rajasthan that provides unique evidence of a wooden carved drain, a rare find in the Indus Valley Civilization.
→ While most Harappan sites used burnt bricks for drainage, the use of hollowed-out log pipes at Kalibangan shows local adaptation and architectural variety.
→ This significance lies in the site's distinctive features that differ from the standardized patterns found in Harappa or Mohenjo-daro.
→ The site is also famous for having the world's earliest furrowed field (ploughed field) evidence.
Information Booster

→ Kalibangan is located on the banks of the now-dry Ghaggar-Hakra river in Hanumangarh district.
→ The name means 'Black Bangles' (Kali-Bangan).
→ It was discovered by A. Ghosh in 1953.
→ Apart from the wooden drain, the site yielded Fire Altars, suggesting religious practices.
→ It shows evidence of both Pre-Harappan and Mature Harappan phases.
Additional Information

Option (A) Lothal: This site is famous for the world's first artificial dockyard and high-quality brick-built drainage systems, but not wooden carved drains.
Option (C) Ropar: Located in Punjab (India), this site is known for being the first Harappan site excavated after Independence and for a grave where a dog was buried with a human.
​​​