Answer:
b. the blood transfusion was mismatched, and the recipient had previously been exposed to the blood group antigens of the blood transfusion.
Step-by-step explanation:
Blood transfusion giving a patient blood or its equivalent product intravenously. Necessary tests are normally carried out to ensure the blood to be transfused matches and is compatible with the blood or body system of the recipient.
However when symptoms like difficulty in breathing, fever,nausea and vomiting is visible after ten transfusion then it’s obvious there was an error which involves blood transfusion being mismatched, and the recipient being previously been exposed to the blood group antigens of the blood transfusion