Which of the following statements is NOT correct about alluvial soil?

The correct answer is Option (3) → In the Himalayan region we find alluvial soil.

The incorrect statement about alluvial soil is:

☀ In the Himalayan region we find alluvial soil.

Alluvial soil is formed by sediments deposited by rivers and streams. The Himalayan region is a mountainous area with very little flat land suitable for deposition by rivers. While some river valleys within the Himalayas may have pockets of alluvial soil, it's not a widespread characteristic of the region.

The other statements are all correct:

• Deltas of Mahanadi, Godavari, and Krishna are indeed formed from alluvial soil deposited by these rivers.
• The distinction between 'bangar' (old alluvial) and 'khadar' (new alluvial) is a valid classification in the context of the Indo-Gangetic plains.
• The vast northern plains of India are primarily composed of alluvial soil deposited over time by the Indus, Ganges, and Brahmaputra river systems.