Botanic gardens have accumulated or collected and documented the information for various plants for education, conservation, display and scientific research. Many of these activities contribute to ex-situ conservation, but botanic gardens also play an important role in- situ conservation. They allow ex-situ conversation of germplasm. They do not provide a natural habitat for wildlife. We can observe tropical plants in botanical gardens and they provide an area for recreation. But they are not the important functions of botanical gardens. Thus, the correct option is B.