<prompt> True about Rh factor isThere are no natural anti-Rh antibodies in serumSeen only in femalesApproximately 15 of Indians are Rh positiveD is the least powerful Rh antigen  <response>: There are no natural anti-Rh antibodies in serum Approximately 15 of the population lacks this antigen D- is the most immuno-genic Rh antigen 