Pinpoint #890 answer: A+, B-, AB+, O+ (the most common), O- (universal red cell donor)

Blood types

1. Pinpoint #890 clue 1: A+

   A positive blood type. A+ is one of the eight main blood types, defined by the A antigen and the Rh factor.

2. Pinpoint #890 clue 2: B-

   B negative blood type. B- is a rarer blood type with the B antigen and no Rh factor.

3. Pinpoint #890 clue 3: AB+

   AB positive blood type. AB+ is a blood type with both A and B antigens plus the Rh factor.

4. Pinpoint #890 clue 4: O+ (the most common)

   O positive blood type. O+ is the most common blood type and is one of the eight main types.

5. Pinpoint #890 clue 5: O- (universal red cell donor)

   O negative blood type. O- is a blood type whose red cells can be given to almost any patient.

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