How Many Main Blood Types are Thare | ब्लड कितने प्रकार के होते हैं
There are four main blood types: A, B, AB, and O. These blood types are determined by the presence or absence of certain antigens on the surface of red blood cells. In addition to the ABO blood types, there is also another factor called the Rh factor, which determines whether the Rh antigen is present … Read more