...Universal donors are the rarest!

P.S. O negative is the universal donor.

The blood group O is the commonest.

O - 37.12%
B - 32.26%
A - 22.88%
AB - 7.74%.

Rh (D) positive - 94.61%
Rh (D) negative - 5.39%

ABO and Rh (D) group distribution and gene frequency; the first multicentric study in India:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4140055/

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