Identify the type of anemia he has

A 70 year old male patient describes symptoms he has noticed in the past 3 days: easily fatigued, severe shortness of breath, being so weak he sleeps all the time, and bright red blood in the toilet with bowel movements. Your assessment reveals cool skin, pale oral mucosa and conjunctivae, positive hemoccult test, and a Hgb of 5 g/dL. You diagnose him with a gastrointestinal bleed. He will require a blood transfusion. He has Blood Type B.

Identify the type of anemia he has.

Describe which blood types he can receive safely and why these are compatible with his Type B.

Describe the blood types he cannot receive and why they are incompatible with Type B

Explain the transfusion reaction if he received incompatible blood products.