I WONDER - What Are The Different Blood Types?

The video tutorial explains the different blood types: A, B, AB, and O, each with positive and negative versions. It highlights AB positive as a universal recipient, capable of receiving red blood cells from all types, and O negative as a universal donor, whose red blood cells can be received by anyone. Additionally, it notes that O positive is the most common blood type globally, while AB negative is the rarest.

Which blood type is the most common in the world?

What is the rarest blood type according to the text?