The correct option is
D Papaver/Poppy
Opium is the air-dried milky exudation obtained from excised unripe fruits. The capsule wall is traversed by a network of branching and anatomizing lactiferous vessels which contain the latex. In the green unripe capsule, the latex is richest in morphine; but as they turn yellow and ripen, the morphine content diminishes and the codeine and narcotine contents increase.
So, the correct answer is 'Papaver/Poppy.'