As a result of Ben having removed most of his stomach to help with drastic weight loss, he is at the greatest risk of Pernicious anemia.
Pernicious anemia happens when a person is unable to absorb vitamin B12 in large enough quantities for it to be used by the body.
This leads to the body attacking its own cells in the stomach. Because Ben's stomach has already been removed in large quantities, it means that when the body attacks the stomach as a result of Pernicious anemia, he will be more affected.
Find out more on Pernicious anemia at https://brainly.com/question/26897511.
