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In India, cluster bean (Guar) is traditionally used as a vegetable or animal feed, but recently the cultivation of this has assumed significance. Which one of the following statements is correct in this context?

A) The oil extracted from seeds is used in the manufacture of biodegradable plastics

B) The gum made from its seeds is used in the extraction of shale gas

C) The leaf extract of this plant has the properties of antihistamines

D) It is a source of high quality biodiesel