The correct option is C Claviceps, Erythroxylon, Papaver
Claviceps is a group of fungi, also called ergot, which contains the lysergic acid and it's precursor ergotamine which synthesises LSD.
Erythroxylum is a genus of flowering plants and around 200 species contain the drug cocaine.
Papaver somniferum is the species of plant from which opium is obtained, which is the source of morphine.
So, the correct answer is option B.