a) A process must be not be holding a resource, but waiting for one to be freed, and then request to acquire it
b) A process must be holding at least one resource and waiting to acquire additional resources that are being held by other processes
c) A process must hold at least one resource and not be waiting to acquire additional resources
d) none of the mentioned

Answer: b
Explanation: A process must be holding at least one resource and waiting to acquire additional resources that are being held by other processes