Understanding the Northwestern Plains Formation

The Northwestern Plains of India are primarily formed by the depositional work of river systems. These plains are characterized by fertile alluvial soil, ideal for agriculture.

Key Rivers Contributing to Northwestern Plains

The Northwestern Plains are mainly formed by the Indus River and its tributaries. Among the options provided:

• Satluj, Beas, and Ravi: These rivers are significant tributaries of the Indus River. Their combined flow and deposition of silt have been instrumental in shaping the vast alluvial plains in the northwestern part of India.

Analysis of Other Options

The other options are incorrect because:

• Krishna, Godavari, and Kaveri: These are major rivers of peninsular India, flowing eastwards into the Bay of Bengal. They form the deltas and coastal plains in the southern and eastern parts of the country, not the Northwestern Plains.
• Ganga, Yamuna, and Brahmaputra: While the Ganga and Yamuna are crucial for the Northern Plains, they are geographically located to the east of the core Northwestern Plains. The Brahmaputra forms the plains in the northeastern part of India.
• Narmada, Tapti, and Mahanadi: The Narmada and Tapti are westward flowing rivers in central India. The Mahanadi flows eastwards in Odisha. None of these are directly associated with the formation of the Northwestern Plains.

Therefore, the rivers Satluj, Beas, and Ravi are the correct contributors to the Northwestern Plains of India.