Which of the Following Does Not Apply to Synthetic Narcotics

Which of the following does not apply to synthetic narcotics?

A) Two of the most widely available synthetic narcotics are meperidine and methadone.
B) Synthetic narcotics are produced entirely within the laboratory.
C) Synthetic narcotics are also covered by the Controlled Substances Act.
D) Meperidine can be administered by injection or taken orally.
E) Large doses can result in convulsions.
F) None of the above.