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14313 Pathology

A 2-year-old boy is brought in by his mother because of the bloody stool after ingestion of unknown amount of rat poison (coumarin based). He is admitted and treated with fresh frozen plasma and vitamin K after his prothrombin time (PT) was found to be prolonged. What is the reason for bloody stool in this case?

ALocal irritation of bowels because of the ingestion of rodenticide
BCoumarin is antagonizing vitamin K reductase necessary for production of factors VIII and IX
CCoumarin is antagonizing vitamin K reductase necessary for production of factors II, VII, IX & X
DCoumarin caused disseminated intravascular coagulation (DIC)
Pathology
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