Which of the following plants is NOT known for its hallucinogenic properties?

Papaver somniferum

The answer is (d). Papaver somniferum, or the poppy plant, is known for its opioid properties, not for its hallucinogenic properties.

The other three plants, Atropa belladonna, Datura, and Cannabis sativa, are all known for their hallucinogenic properties.
Atropa belladonna, also known as belladonna or deadly nightshade, contains atropine, which is a potent hallucinogen.

Datura is a genus of flowering plants that contains several species that are known for their hallucinogenic properties.

Cannabis sativa, or marijuana, is a plant that contains tetrahydrocannabinol (THC), which is a psychoactive compound that can cause hallucinations.