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UP POLICE SIUP POLICE SI Hard Mock Set 2Hard GK

UP POLICE SI Mock Test Set 2, Q39: Identify the correct answer for universal donor blood group in basic ABO-Rh system.

A. B negative
B. O negative
C. AB positive
D. A positive
Correct Answer: B. O negative
Explanation: O negative is commonly called universal donor. Category: UP POLICE SI. Set: 2.
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