If your parents/siblings blood group are AB and A, can your blood group be O?

If i had met an accident that requires blood transfusion, could it be possible that a large influx of O group blood change my blood group?If your parents/siblings blood group are AB and A, can your blood group be O?
A large influx of O blood would NOT change your blood type. However, if your sibling are AB and A, you can be blood type O. One of your parents would have to be type A and the other type B. You could not have type O blood if your parents were type AB and type A. I've included a link to a site that explains how you figure this stuff out.
you can't have o if your parents are a and b
No, you cant
Blood group, is a permanent genetic trait, determined by our genes, and its a permanent characteristic that does NOT change in a lifetime (like the color of the eyes, color of skin, etcetera)
No matter how much of group "O" blood transfusion you have had, You CAN NOT change your blood type, you see.your blood is produced in your bone marrow, and the genetic code will not change by external factors.in other words, your DNA will not change no matter what (surgery, trauma, transfusion etc)
You see blood types work this way to be AB you must have both the A and B geneotype. To be A you can either have (AA) or (Ai) geneotype and to be B you can have the (BB) or (Bi) geneotype and to be O you have to have an (ii) geneotype. To put it simply you get one letter from each parent. So if your parents are both either A or B then yes you can if they both have the geneotypes (Ai) or (Bi) and they both give you the letter (i) but since AB can only be made with the geneotype (AB) then if one of your parents is (AB) then you can't get the letter i from that parent and thus cannot be type O. I hope that helps.