The correct answer is: a) Taxus baccata (Himalayan Yew).
Taxus baccata (Himalayan Yew) is a valuable medicinal plant found in Arunachal Pradesh. It is a slow-growing, evergreen coniferous tree that can reach a height of up to 20 meters. The leaves are needle-like and arranged spirally on the branches. The bark is reddish-brown and fissured. The flowers are small and green, and the fruit is a red berry.
The Himalayan Yew is a valuable medicinal plant because it contains a number of compounds that have medicinal properties. These compounds include taxol, baccatin III, and 10-deacetylbaccatin III. Taxol is a powerful anticancer drug that is used to treat ovarian cancer, breast cancer, and lung cancer. Baccatin III and 10-deacetylbaccatin III are also anticancer drugs, but they are not as well-studied as taxol.
The Himalayan Yew is also used in traditional medicine to treat a variety of conditions, including cancer, heart disease, and diabetes. However, there is limited scientific evidence to support the use of the Himalayan Yew for these conditions.
Neem, Tulsi, and Aloe Vera are also valuable medicinal plants, but they are not found in Arunachal Pradesh. Neem is a tree that is native to India and other parts of Asia. Tulsi is a herb that is native to India and other parts of Asia. Aloe Vera is a succulent plant that is native to Africa.
Neem is used in traditional medicine to treat a variety of conditions, including skin diseases, hair loss, and diabetes. Tulsi is used in traditional medicine to treat a variety of conditions, including respiratory problems, heart disease, and cancer. Aloe Vera is used in traditional medicine to treat a variety of conditions, including burns, cuts, and sunburn.