Which of the Following Is the Most Common Etiology of B₁₂

question 3

Multiple Choice

Which of the following is the most common etiology of B₁₂ deficiency in pernicious anemia?

• A)Antibody interference with absorption
• B)Patient's inability to split the R factor from B₁₂ in foods
• C)Underproduction of B₁₂ in the large intestine
• D)Underproduction of B₁₂ in the liver
• E)Production of antibodies to intrinsic factor

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