Will blood type O clump or not with anti RH antibodies?

Blood type O will not clump with anti-Rh antibodies because the Rh factor is a separate antigen from the A and B antigens that determine blood type. Type O blood is characterized by the absence of A and B antigens, and the presence or absence of the Rh factor (positive or negative) is independent of the A and B antigens. Therefore, if the blood type is O and Rh-negative, it will not react with anti-Rh antibodies.