Q). A substance derived from the Madagascar periwinkle, which has proved useful in decreasing mortality among young leukemia patients, is cultivated in China as part of a program to integrate traditional herbal medicine into a contemporary system of health care.
[A] A substance derived from the Madagascar periwinkle, which has proved useful in decreasing mortality among young leukemia patients,
A derivative, which has proved useful in decreasing mortality among young leukemia patients, of the Madagascar periwinkle,
[C] A Madagascar periwinkle derivative, which has proved useful in decreasing mortality among young leukemia patients,
[D] The Madagascar periwinkle has a derivative which has proved useful in decreasing mortality among young leukemia patients, that
[E] The Madagascar periwinkle, a derivative of which has proved useful in decreasing mortality among young leukemia patients,