Chemically Modified Anti-D Reacted Negatively in a Patient with a Warm-Reacting

Chemically modified anti-D reacted negatively in a patient with a warm-reacting autoantibody. A Du test was performed using monospecific IgG, which was positive in Coombs' phase. A fetal screen (rosette test) was also performed on this patient and showed no rosettes when viewed microscopically. Based on these results, what is the correct Rh type of this patient?

A) Rh-positive
B) Rh-negative
C) Rh-unknown
D) Du-positive

Correct Answer:

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