This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Wound with bloody discharge belongs to which grade as per Southampton wound grading system 
Select and explain. 
A. Grade 1, B. Grade 2, C. Grade 3, D. Grade 4
C: Grade 3
Answer: C: Grade 3 
Explanation: Southampton wound grading system for healing and injection :

Grade 0 is normal healing.
Grade 1 is with bruising / mild erythema.
Grade 2 is severe erythema with other features of inflammation at or around wound.
Grade 3 is serous or bloody discharge.
Grade 4 is presence of pus or deep infection or tissue break - down or significant haematoma.