Answer: Induration.
What ASEPSIS is: ASEPSIS is a validated scoring system for surgical wound infection. The name itself is the mnemonic for its daily wound criteria: Additional treatment, Serous discharge, Erythema, Purulent exudate, Separation of deep tissues, plus Isolation of bacteria and Stay as inpatient (prolonged).
Why option B: Induration is not one of the ASEPSIS components, so it is the correct answer to this negatively framed question.
Why the others are wrong: Serous discharge (C), erythema (A) and purulent exudate (P) are each scored daily 0 to 5 or 0 to 10 and are genuine parts of the system, so they cannot be the answer.
Use: A higher total score indicates a more significant wound infection and guides whether antibiotics, drainage or debridement are needed.
Ref: Bailey and Love, Short Practice of Surgery, 27e, Pg 48.