Which pieces of information link up correctly?

Choice A rationale
Administering vitamin B12 to increase RBC size is not appropriate in this scenario. The elevated MCV indicates macrocytic anemia, which is often due to vitamin B12 deficiency. The goal is to restore normal RBC maturation, not to increase RBC size.
Choice B rationale
Administering vitamin B12 to restore normal RBC maturation is the appropriate action. The elevated MCV indicates macrocytic anemia, which is often due to vitamin B12 deficiency.
Administering vitamin B12 will help restore normal RBC maturation and correct the anemia.
Choice C rationale
Administering medication to decrease RBC size is not appropriate in this scenario. The elevated MCV indicates macrocytic anemia, which is often due to vitamin B12 deficiency. The goal is to restore normal RBC maturation, not to decrease RBC size.
Choice D rationale
Administering iron to increase the formation of hemoglobin molecules is not appropriate in this scenario. The elevated MCV indicates macrocytic anemia, which is often due to vitamin B12 deficiency. Iron supplementation is typically used for microcytic anemia, not macrocytic anemia.

Choice A rationale
Nausea and vomiting can be caused by various conditions, including gastrointestinal issues and brain injuries, but they are not specifically indicative of a diffuse brain stem injury.
Choice B rationale
Nuchal rigidity, or neck stiffness, is a classic sign of meningeal irritation, often due to meningeal edema in conditions like meningitis.
Choice C rationale
Bilateral fixed and dilated pupils are more commonly associated with severe brain injury or increased intracranial pressure, not specifically a cerebellar brain attack.
Choice D rationale
Brudzinski’s sign is a physical exam finding indicative of meningeal irritation, commonly seen in bacterial meningitis, not specifically viral meningitis.