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': "In stab wounds, Langer's lines determine: \nSelect and explain. \nA. Direction, B. Gaping, C. Shelving, D. Healing", 'role': 'user'}, {'content': 'Answer: B \nExplanation: CLEAVAGE LINES OF LANGER The pattern of collagen fiber arrangement are the lines of cleavage of the skin and their linear representations on the skin are known as "Langer\'s line of cleavage" . A stab wound with long axis at right angles to the cleavage lines of Langer, will gape more. * A stab injury that runs parallel to these lines will gape less.', 'role': 'assistant'}]