Which of the following statements is correct regarding LSD?

The correct choice encompasses all the provided statements about LSD, highlighting a comprehensive understanding of the substance's origins, effects, and historical context.

LSD is indeed produced from lysergic acid, which is sourced from ergot, a fungus that typically affects rye. This fact establishes a crucial link between the natural world and the synthetic nature of LSD, making it important in discussions of pharmacology and psychoactive substances.

Additionally, the psychotomimetic effects of LSD were initially discovered accidentally by Swiss chemist Albert Hofmann in 1943. His unintended experience with the drug after ingesting it underscores the serendipitous nature of scientific discoveries, which often lead to significant insights about substances and their effects on the human mind.

Finally, following its peak popularity during the counterculture movement of the 1960s, LSD's use and acceptance declined. This decline was a result of various factors, including legal restrictions and changing social attitudes towards drug use. This historical perspective provides context for understanding the shifts in public perception and policy regarding psychedelic substances.

Considering that all these statements paint an accurate picture of LSD concerning its origins, effects, and popularity trends, the choice that includes all of these statements is indeed correct.