Adhatoda vasica is used for asthma, cough, tuberculosis, malaria etc. The leaves of Adhatoda vasica contain the alkaloid vascine. A decoction of the leaves or their powder is also given, especially for chronic bronchitis. Thus, option A is wrong.
Curcuma longa (turmeric) has digestive, anti cancer and other medicinal values. Thus, option B is wrong.
Hemidesmus indicus, also known in ancient ayurvedic medicine as sugandi or sariva, has been revered for its medicinal properties for nearly a thousand years. Traditional ayurvedic medicine practitioners have used sariva for hundreds and hundreds of years; it was used as a healing herb as well as a magical-spiritual dream herb. It is used to treat stomach problems, cure rashes, ease the mind, quell the symptoms of syphilis, induce trance states and deep meditation and to clarify and prepare the mind for the dream world. Thus, option C is wrong.
Rauvolfia serpentina contains a number of bioactive chemicals, including reserpine, ajmaline, deserpidine, rescinnamine, serpentinine. It has been used for millennia to treat insect stings and the bites of venomous reptiles. Thus, option D is wrong.
Thus, the correct answer is option A.