Explanation: The Narmada and Tapi rivers are two major rivers in Madhya Pradesh, each with unique characteristics that set them apart from other rivers in the region.
Firstly, the Narmada and Tapi rivers do not form alluvial or deltaic deposits at their mouths. Alluvial deposits are sediments deposited by rivers, typically in floodplains, while deltaic deposits are formed when a river deposits sediment at its mouth, creating a delta. The absence of these deposits in the Narmada and Tapi rivers is due to their unique geological and topographical settings. The Narmada flows into the Arabian Sea through a narrow coastal plain, and the Tapi also flows into the Arabian Sea, but through a more rugged terrain. These conditions prevent the formation of significant alluvial or deltaic deposits.
Secondly, the Narmada and Tapi rivers flow through trough faults. A trough fault is a geological feature where the Earth's crust has been stretched and thinned, creating a long, narrow depression. The Narmada and Tapi rivers have carved their paths through these trough faults, which are part of the rift valley system in central India. This geological feature is significant because it influences the river's course and the surrounding landscape.
Lastly, the Tapi river originates from Multai in Madhya Pradesh. Multai is a small town located in the Betul district of Madhya Pradesh. The Tapi river, also known as the Tapti, is one of the major west-flowing rivers in India, and its origin in Madhya Pradesh is an important geographical fact.
In summary, the Narmada and Tapi rivers are notable for their lack of alluvial and deltaic deposits, their flow through trough faults, and the Tapi's origin in Multai, Madhya Pradesh. These characteristics are essential for understanding the geographical and geological features of the region. Therefore, all the statements provided are correct, making option D the correct answer.