Can you put a picture for the answers or multiple choice?
D, though C also sounds like a decent answer
hy·pox·e·mi·a
/ˌhīpäkˈsēmēə/
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noun
MEDICINE
an abnormally low concentration of oxygen in the blood.
ECOLOGY
oxygen deficiency in a biotic environment.
Nucleolus is located within the nucleus and is site of the ribosomal RNA synthesis