This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Anemia will be more severe in which of the following endocrine condition? 
Select and explain. 
A. Addison's disease, B. Hypothyroidism, C. Castration, D. Hyperparathyroidism
A: Addison's disease
Answer: A: Addison's disease 
Explanation: Anemia will be more severe in Addison's disease. Hyperparathyroidism may lead to mild anemia due to decreased EPO production. Patients who are hypothyroid or have deficits in pituitary hormones also develop mild anemia. Reference: Harrisons Principles of Internal Medicine, 18th Edition, Page 850