An extract of the plant Decalepis hamiltonii, which has proved helpful

IMO A. What has been proven to protect brain cells? The extract from that plant. 75% confident on this one.

I will go with option B , though this option seems crap but modifiers are correctly placed here.

IMO E

(A) An extract of the plant Decalepis hamiltonii, which has proved helpful in protecting brain cells from damaging effects of alcohol, ------ An Extract cannot be grown. Meaning Error

(B) An extract, which has proved helpful in protecting brain cells from damaging effects of alcohol, comes from the plant Decalepis hamiltonii,---- Same Error as A. A Plant is grown not an extract.

(C) A Decalepis hamiltonii extract, which has proved helpful in protecting brain cells from damaging effects of alcohol,---- Same error as A and B.

(D) The Decalepis hamiltonii plant has an extract, which has proved helpful in protecting brain cells from damaging effects of alcohol,----- If you eliminate the fluff, the sentence says "has an extract is grown in India" Sounds like a run on

(E) The Decalepis hamiltonii plant, an extract of which has proved helpful in protecting brain cells from damaging effects of alcohol, ----Correct.At least that's what I think

An extract of the plant Decalepis hamiltonii, which has proved helpful in protecting brain cells from damaging effects of alcohol, is grown across India, where it has been used in traditional folk medicine for centuries.


(A) An extract of the plant Decalepis hamiltonii, which has proved helpful in protecting brain cells from damaging effects of alcohol, --> wrong: "An extract is grown "

(B) An extract, which has proved helpful in protecting brain cells from damaging effects of alcohol, comes from the plant Decalepis hamiltonii, --> two verbs w/o conjunction

(C) A Decalepis hamiltonii extract, which has proved helpful in protecting brain cells from damaging effects of alcohol, --> wrong: "A Decalepis hamiltonii extract is grown "

(D) The Decalepis hamiltonii plant has an extract, which has proved helpful in protecting brain cells from damaging effects of alcohol,--> two verbs w/o conjunction

(E) The Decalepis hamiltonii plant, an extract of which has proved helpful in protecting brain cells from damaging effects of alcohol, --> correct

The most important part of this sentence is understanding what the subject of the clause is.

The clause is about something growing - extracts don’t grow. This effectively makes every choice other than E incorrect, because the first four choices all seem to suggest that it is the extract that is grown across India, not the plant itself.

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