I got a question for you: Passage: The main syndrome of vitamin B deficiency is pernicious anemia. It is characterized by a triad of symptoms:\n\nQuestion: Based on this passage, a severe vitamin b12 deficiency results in what form of anemia?
Let's think first:
User
The important part for answering this question is: The main syndrome of vitamin B deficiency is pernicious anemia.
Therefore, the answer is pernicious anemia.
Assistant