The correct answer is (b), Jaunsari.
The Dhiyanti and Rayanti system is a traditional land tenure system practiced by the Jaunsari people of Uttarakhand, India. Under this system, land is divided into two categories: Dhiyanti land, which is owned by the community, and Rayanti land, which is owned by individuals. Dhiyanti land is used for common purposes such as grazing and firewood collection, while Rayanti land is used for cultivation and other private purposes.
The Dhiyanti and Rayanti system is a complex and dynamic system that has evolved over time in response to the needs of the Jaunsari people. It is a system that is based on the principle of community ownership and cooperation, and it has played an important role in the social and economic development of the Jaunsari people.
The other options are incorrect because they are not related to the Dhiyanti and Rayanti system. The Tharu are an ethnic group of people who live in the Terai region of Nepal and India. The Jad are an ethnic group of people who live in the Jaunsar-Bawar region of Uttarakhand, India. The Bhotia are an ethnic group of people who live in the Himalayan region of India, Nepal, and Bhutan.