Identify the molecules (a) and (b) shown below and select the right option giving their source and use.
Molecule $ \to $ (b) Heroin, Source $ \to $ Cannabis sativa, Use $ \to $ Depressant and slows down body functions
Molecule $ \to $ (a) Morphine, Source $ \to $ Papaver somniferum , Use $ \to $ Sedative and pain killer
Molecule $ \to $ (a) Cocaine, Source $ \to $ Erythroxylum coca , Use $ \to $ Accelerates the transport of dopamine
Molecule $ \to $ (b) Cannabinoid, Source $ \to $ Atropa belladona, Use $ \to $ Produces hallucinations
