The correct option is D Claviceps Purpurea
Claviceps Purpurea is an ergot fungus that grows on the ears of rye and related cereal and forage plants. Ergot contains ergotamine, which is used to synthesize lysergic acid, an analog of and precursor for synthesis of LSD.
Thus, the correct answer is option (D), 'Claviceps Purpurea.