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

• A. It is a source of high quality biodiesel
• B. The extract of the leaves of this plant has antihistamine properties.
• C. The gum prepared from its seeds is used in the extraction of shale gas.
• D. The oil extracted from the seeds is used in the manufacture of biodegradable compounds.