USMLE-Rx Step 1 Qmax Challenge #3884

Check out today’s Step 1 Qmax Question Challenge.

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USMLE-Rx Step 1 Qmax Challenge #3884A baby boy was born at 37 weeks’ gestation at home without complication. Three days later, the umbilical stump started oozing blood. In addition, the baby’s last two bowel movements appeared black and were malodorous. The family history is negative for any known bleeding disorders.

Which of the coagulation profiles in the table is most likely for this infant?

A. A
B. B
C. C
D. D
E. E


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