A) Pinus-a gymnosperm
B) Acacia-an angiosperm
C) Quercus-a gymnosperm and cedrus, an angiosperm
D) Quercus-a angiosperm only
Correct Answer: D
Solution :
Cork of commerce is obtained from Quercus. Which is an angiosperm. It is extensively used in pharmaceutical industry to make cork of bottle, etc. due to its durability and un reactivity characteristics. It is also resistant to acid and imprevious to water.
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