human being have four type of blood groups A,b Ab and O each groups are negative are positive submit a report on characteristics of each blood group . which is the most common blood group in the world
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O-positive
O-positiveIn general, the rarest blood type is AB-negative and the most common is O-positive. Here's a breakdown of the most rare and common blood types by ethnicity, according to the American Red Cross.
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the most common blood group in the world is 'O' positive.
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