In India, cluster bean (Guar) istraditionally used as a vegetable or animal feed, butrecently 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 gun made from its seeds is used in the extraction of shale gas
• C. The leaf extract of this plant has the properties of anti-histamines
• D. It is a source of high quality biodiesel