If you have had an accident and need a blood transfusion. you have B blood . your motherbhas type O .can she give her blood to you?

No, your mother with type O blood cannot donate blood to you if you have type B blood. Type O blood does not contain B antigens, but it does contain anti-A and anti-B antibodies, which would react against your B blood type. Therefore, it would not be safe for you to receive her blood.