Circular huts with conical roofs are found in East India.

Explanation:
The correct answer to the question is option 'A', which states that circular huts with conical roofs are found in East India. This answer is based on the architectural style prevalent in the region.

East India, comprising the states of Bihar, Jharkhand, Odisha, and West Bengal, has a rich cultural heritage and diverse architectural styles. The circular huts with conical roofs are a prominent feature of the traditional architecture in this region.

Here is an explanation of why circular huts with conical roofs are found in East India:

1. Cultural Influence:
The architectural styles of a region are often influenced by its culture and traditions. East India has a unique cultural heritage, with influences from various ancient civilizations and indigenous communities. The circular huts with conical roofs are a reflection of the traditional building practices and design preferences of the people living in this region.

2. Climate Considerations:
The conical roof design of these huts is well-suited to the climatic conditions of East India. The conical shape allows for better rainwater drainage, preventing waterlogging and leakage. Moreover, the circular shape provides stability against strong winds and cyclones that are common in this coastal region.

3. Material Availability:
The choice of circular huts with conical roofs may also be influenced by the availability of construction materials in the region. East India is known for its abundant bamboo and thatch, which are commonly used in building these huts. The circular shape is easier to construct using bamboo, which is flexible and can be bent to form a circular structure.

4. Traditional Building Techniques:
Circular huts with conical roofs have been a part of the architectural heritage of East India for centuries. The construction techniques for these huts have been passed down through generations, preserving the traditional craftsmanship and skills associated with this style.

In conclusion, the circular huts with conical roofs are found in East India due to cultural influences, climatic considerations, material availability, and traditional building techniques. These structures are not exclusive to East India, but the prevalence and popularity of this architectural style in the region make it the correct answer to the given question.