Final answer:
Some people get B12 shots to boost energy; others, to treat the pernicious kind of vitamin B12 deficiency anemia. Correct option is a.
Step-by-step explanation:
Some people get B12 shots to boost energy; others, to treat the pernicious kind of vitamin B12 deficiency anemia.
Pernicious anemia is caused by poor absorption of vitamin B12 and is often seen in patients with Crohn's disease, surgical removal of the intestines or stomach, intestinal parasites, and AIDS.