Question: Which statement about critical section in multi - threading is invalid? critical section can lead to thread racing synchronized access to the critical section can

Which statement about critical section in multi-threading is invalid?
critical section can lead to thread racing
synchronized access to the critical section can achieve mutual exclusion among the threads
Both lock and condition variables, or lock and semaphore, are required to protect the critical section effectively.
Critical section refers to a section of code in a program that access the shared resource.

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