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
[{'content': 'In an open injury during toileting and debridement,muscle viability is detected by -a) Colour of the muscleb) Muscle sizec) Muscle functiond) Muscle contractilitye) Punctate bleeding spots on cut edge \nSelect and explain. \nA. acd, B. ade, C. abd, D. ad', 'role': 'user'}, {'content': "Answer: B \nExplanation: Muscle viability is detected by '4C'\n\nColour - dead muscle has dark unhealthy colour, has lost its sheen\nContractility - dead muscles does not twitch when held by forceps.\nConsistency - dead muscles has lost its turgor and is mushy in consistency.\nCapillary bleeding - dead muscle does not bleed at cut ends.\n\nAlso remember\nMost important step in wound toileting & debridement is excision of dead tissues, that's why better term for toileting & debridement is 'wound excision'.", 'role': 'assistant'}]