Which of the Following Is Not Correct

Which of the following is not correct?

A) Vinblastine and vincristine are compounds from Vinca that are successful treatments for various forms of leukemia and lymphoma.
B) Taxol,a terpene obtained from the bark of the Pacific yew,is a known poisonous plant that has antitumor properties in the treatment of ovarian,lung,head,and neck cancers.
C) Compounds from Camptotheca acuminata have confirmed anticancer properties.
D) St John's wort (Hypericum perforatum) may work against depression by elevating specific mood-enhancing neurotransmitters such as serotonin.
E) All of the above are correct.