Read each of the following sentences to find out whether there is any error in it. The error; If any, will be in one part of the sentence. The number of that part is the answer. If there is no error; the answer is e:. (Ignore errors of punctuation, if any).
He wants to (a)/ set up a laboratory (b)/ to undertake research (c)/ into a vaccine for cancer. (d)/ No error (e)
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