Which of the following regions of northern plains is the most fertile?

Correct answer: Khadar

Explanation: ✅ Correct Answer: A) Khadar 📚 Explanation: In the geography of the Indo-Gangetic plains, the 'Khadar' region represents the low-lying floodplain composed of new, young alluvial soil deposited by rivers during the annual monsoon floods. This continuous replenishment makes it exceptionally fertile for agriculture. In contrast, 'Bhangar' consists of older, less fertile clay soil found at higher levels away from the river banks. Khadar is highly valued for intensive crop cultivation due to its nutrient richness.