In my opinion, the best answer among the choices listed is option B. Bioflavonoids are naturally occurring plant chemicals. From, the name "bio", these substances most likely comes from living organisms. Flavonoids that come from living organisms. Bioflavonoids are found in the rind of green citrus fruits and in rose hips.
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Usually the organisms in plants such as algae fungi and endosymboyic bacteris
He believed that disease was caused by physical and environmental factors that could be studied.