Correct Answer:
D. Ravi
Correct answer: Ravi. The Ravi is the most polluted river because of industrial and sewage waste, especially around Lahore.
Background: The Ravi flows past Lahore, one of Pakistan’s largest industrial cities.
- Indus: The Indus is much larger and less polluted.
- Jhelum: The Jhelum is less polluted.
- Sutlej: The Sutlej is polluted, but the Ravi is the most polluted.
Did you know? Much of the Ravi’s flow comes from drains and wastewater.
Memory trick: Ravi + Lahore factories.