So this is our receiver, it's the recipient and this is the person that is donating that blood. Now yes means that by mixing these two blood types we basically do not have Agglutination taking place. And so mixing is allowed. But no means that we cannot mix these two blood types because Agglutination will take place, an antibody will bind to an antigen, clumping will take place. And so our blood will be rejected. So let's begin with A.