If a person has AB- blood, who can donate blood to him?

🔑 Key Points
🧬 AB- Blood Type Compatibility
✳️ The correct answer is 1) A-, B-, O-, AB-.
✳️ A person with AB- blood type can receive blood from individuals with A-, B-, O-, and AB- blood types.
✳️ AB- individuals have both A and B antigens on their red blood cells but lack the Rh antigen, making them compatible with other Rh-negative blood types.

🔑 Additional Information
✔️ AB- Blood Type:
➤ Known as universal recipients within the Rh-negative group.
➤ Ensures safe blood transfusions by preventing adverse reactions.
✔️ Rh Factor:
➤ A protein on the surface of red blood cells; those with it are Rh-positive, and those without are Rh-negative.
✔️ ABO Blood Group System:
➤ Classifies blood based on the presence or absence of A and B antigens.
➤ The four main types: A, B, AB, and O.
✔️ In emergencies, O- blood is used as it is considered the universal donor for all blood types.