The correct answer is E. Balrampur.
Dharwar rocks are a type of metamorphic rock that formed during the Dharwar orogeny, which occurred between 2.5 and 2.1 billion years ago. They are found in a belt that extends from southern India to northern Sri Lanka.
The Dharwar rocks in Balrampur are not as well-developed as those in other parts of the Dharwar craton. This is because they have been affected by later tectonic activity, which has caused them to be folded and faulted.
The Dharwar rocks in Balrampur are composed of a variety of minerals, including quartz, feldspar, mica, and amphibole. They are typically dark in color, and they have a coarse-grained texture.
The Dharwar rocks in Balrampur are important because they provide a record of the geological history of the region. They also contain valuable mineral resources, such as gold and copper.
The other options are incorrect because Dharwar rocks are found in all of those regions.