(d) Papaver somniferum

Explanation:

Opium is a narcotic formed from the latex released by lacerating the immature seed pods of opium poppies (Papaver somniferum). Morphine is the most prevalent alkaloid in opium, about 10%-16% of the total alkaloids. It is responsible for most of the harmful effects such as lung edema, respiratory difficulties, coma, or cardiac or respiratory collapse.