The correct answer is: a) Sarpagandha
Sarpagandha (Rauwolfia serpentina) is a medicinal plant that is cultivated in Assam. It is used in traditional medicine to treat a variety of conditions, including high blood pressure, anxiety, and insomnia.
Ashwagandha (Withania somnifera) is another medicinal plant that is used in traditional medicine. It is native to India and is also cultivated in Assam. Ashwagandha is used to treat a variety of conditions, including stress, anxiety, and fatigue.
Tulsi (Ocimum tenuiflorum) is a holy basil plant that is used in traditional medicine. It is native to India and is also cultivated in Assam. Tulsi is used to treat a variety of conditions, including respiratory problems, digestive problems, and skin problems.
Aloe vera is a succulent plant that is used in traditional medicine. It is native to Africa and is also cultivated in Assam. Aloe vera is used to treat a variety of conditions, including sunburn, skin burns, and constipation.
Sarpagandha is the only medicinal plant on the list that is cultivated in Assam.