Correct option is D
Sol. If a blood transfusion reaction is suspected, the first and most critical step is to stop the transfusion immediately to prevent further antigen-antibody reaction. Then, monitor vital signs and inform the physician and blood bank.
Explanation of each option:
· (a) Inform the physician – Important, but comes after stopping the transfusion. Patient safety comes first.
· (b) Inform blood bank – Required for reaction documentation and investigation, but not the immediate step.
· (c) Monitor vital signs – Must be done continuously, but not helpful if transfusion is still ongoing.
· (d) Stop transfusion + monitor vitals – Correct. This prevents worsening of the reaction and helps assess severity.