Which of the following blood groups is that of the ...

Which of the following blood groups is that of the ‘Universal donor’?

A. A

B. O

C. AB

D. B

Select your answer:

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Proteins that help get rid of infections.

A. antibodies

B. skin

C. allergies

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Propionic acid fermentation is carried out by several bacteria that belong to the genus Propionibacterium and to the species clostridium propionicum. What is the initial material used to start propionic acid fermentation?

A. Glucose only

B. Lactate only

C. Both glucose and lactate

D. None