The correct option is
A Erythroxylon cocaCocaine is a strong stimulant mostly used as a recreational drug.
Erythroxylon coca is the plant that contains vital nutrients as well as numerous alkaloids, including cocaine.
Erythroxylum coca is one of two species of cultivated coca.The coca plant resembles a blackthorn bush, and grows to a height of 2–3 m (7–10 ft). The branches are straight, and the leaves, which have a green tint, are thin, opaque, oval and taper at the extremities. A marked characteristic of the leaf is an areolated portion bounded by two longitudinal curved lines, one line on each side of the midrib, and more conspicuous on the under face of the leaf.
Therefore, the correct answer is option A.