Final answer:
False, pernicious anemia is a type of anemia caused by a deficiency in vitamin B12, not a deficiency in both vitamin B12 and folate.
Step-by-step explanation:
Answer: B) False. Pernicious anemia is a type of anemia caused by a decreased secretion of intrinsic factor by the gastric mucous membrane, which results in a vitamin B12 (cyanocobalamin) deficiency. Intrinsic factor is needed for the absorption of vitamin B12 in the ileum of the small intestine. Deficiency in folate, on the other hand, can cause a different type of anemia known as folate deficiency anemia. Both types of anemia can lead to very similar symptoms, including fatigue, shortness of breath, and lightheadedness, but they are caused by different mechanisms and require different treatments.
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