Which statement is NOT true about vitamin B12?
A) Vitamin B12 contains a porphyrin ring.
B) Vitamin B12 contains a carbon-cobalt bond.
C) Vitamin B12 readily undergoes homolytic bond cleavage.
D) Deficiency of vitamin B12 causes pernicious anemia.
E) Vitamin B12 catalyzes hydrogen atom exchange with solvent H2O.
Correct Answer:
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