This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mechanical injuries, Subject name: Forensic Medicine
[{'content': 'A clean incised wound heals by - \nSelect and explain. \nA. Primary intention, B. Secondary intention, C. Excessive scarring, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The synopsis of forensic medicine &toxicology . ; Dr k.s.narayan reddy ; 28 th edition ; Pg.no.113 A clean incised wound heals by primary intention . the steps are : Few minutes - dilatation of capillaries & margination & emigration of neutrophils ,reactive changes in the tissue histiocytes& swelling of vascular endothelium . 12 hours - reactive changes occur in the fibroblasts at the site of injury within few hours ; monocytes appear in exudate . 15 hours - monocytes begin to undergo mitotic division . 24 hours - epithelium begins to grow at the edges .Vascular bud begin to form . 72 hours - vascularized granulation tissue is formed . 4-5 days - new fibrils are formed . 1 week - scar formation in small wound .', 'role': 'assistant'}]