The correct option is
A Papaver somniferum
Papaver somniferum is the scientific name of opium poppy. It belongs to family Papaveraceae. Opium is a milky latex obtained from unriped seed capsule of opium poppy. It is used to produce heroin and other opioid drugs. It is used as analgesic and to treat diarrhea.
Thus, the correct answer is option A.