Medicine for curing respiratory problems is obtained from
Ephedra is a herb that has been used in Traditional Chinese Medicine for more than 5,000 years. It was used primarily to treat asthma, bronchitis, and high fever.
Calories are used in making floral tassels in some mainland Southeast Asian cultures
Eucalyptus is a fast-growing evergreen tree native and is used to reduce the symptoms of coughs, colds, and congestion.
Cannabis is a psychoactive drug obtained from the Cannabis plant used for recreational purposes.
Thus the correct option is A.