The correct answer is: A. Vindhyan.
Vindhyan rocks are sedimentary rocks that were formed during the Vindhyan Supergroup, which is a group of sedimentary rocks that were deposited between 1.9 and 1.5 billion years ago. The Vindhyan Supergroup is the oldest sedimentary rock group in India and is composed of sandstone, shale, limestone, and conglomerate.
Vindhyan rocks are important for building purposes because they are strong and durable. They are also relatively easy to quarry and work with. Vindhyan rocks have been used for building purposes for centuries, and they are still used today in the construction of buildings, roads, and bridges.
The other options are incorrect because they are not sedimentary rocks. Tertiary rocks are igneous rocks that were formed during the Tertiary period, which is a geological period that lasted from 66 million to 2.6 million years ago. Dharwar rocks are metamorphic rocks that were formed during the Dharwar Supergroup, which is a group of metamorphic rocks that were formed between 2.5 and 2.0 billion years ago. Quaternary rocks are sedimentary rocks that were formed during the Quaternary period, which is a geological period that began 2.6 million years ago and continues to the present day.
I hope this helps!