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

• A. The oil extracted from the seeds is used in the manufacture of biodegradable compounds.
• B. The gum produced from its seeds is used in the extraction of rock gas.
• C. The essence of the leaves of this plant has antihistamine properties.
• D. It is a source of high quality bio/diesel