If your blood clumped with both anti-A and anti-B antibodies, it would indicate that you have type AB blood. This means that your red blood cells have both A and B antigens on their surface. This can lead to a serious immune response if you receive a blood transfusion with the wrong blood type.
it has red blood cells with neither a nor b antigensand has anti a and antib antibodies last but lest it is a universal donor
This is an extremely rare ABO group, called so because it was first discovered among some people in Bombay (now Mumbai). Although the group is more likely to occur in East Indians, it is a very rare group even here. It is not restricted to East Indians but found in Caucasians, Japanese, etc. Their red cells lack ABH antigens and their sera contain anti-A and anti-B and anti-H. The anti-H would not be detected in the ABO group but would be detectable in pretransfusion tests.