Which major perennial river flows along the eastern boundary of Haryana, separating it from the state of Uttar Pradesh?

💡 Solution & Explanation

The Yamuna River forms the entire eastern boundary of Haryana, flowing southward from Yamunanagar down to Palwal before entering Delhi and Uttar Pradesh. The Ganga flows much further east across Uttar Pradesh. The Yamuna is the lifeline for Haryana's eastern canal irrigation networks, including the Western Yamuna Canal.