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
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 
Select and explain. 
A. acd, B. ade, C. abd, D. ad
B: ade
Answer: B: ade 
Explanation: Muscle viability is detected by '4C'

Colour - dead muscle has dark unhealthy colour, has lost its sheen
Contractility - dead muscles does not twitch when held by forceps.
Consistency - dead muscles has lost its turgor and is mushy in consistency.
Capillary bleeding - dead muscle does not bleed at cut ends.

Also remember
Most important step in wound toileting & debridement is excision of dead tissues, that's why better term for toileting & debridement is 'wound excision'.