The goal of synchronization mechanisms in parallel programming is to:

Synchronization mechanisms in parallel/concurrent programming (locks, semaphores, monitors, mutexes) coordinate how multiple processes or threads access shared resources. A synchronization design is judged against a set of correctness properties it must satisfy: mutual exclusion within critical sections, freedom from race conditions, and freedom from deadlock. These properties are not automatic side effects of simply introducing locks or semaphores; careless synchronization (for example, processes acquiring the same set of locks in different orders) can itself create a deadlock. So a synchronization protocol has to be specifically designed, not merely present, to avoid that hazard while still coordinating concurrent access.

Among the choices offered here, only "avoid deadlock situations" names one of these correctness properties that a synchronization protocol is designed to satisfy. A carefully designed scheme (for example, acquiring locks in a fixed global order, or performing a resource-allocation check before granting a shared resource) targets exactly this design objective: keeping a set of processes from settling into a cycle of mutual waiting over shared resources, the failure mode that undisciplined synchronization can otherwise introduce.

• "Speed up the execution of processes" describes a performance outcome (throughput/latency). Synchronization primitives instead impose waiting and ordering constraints on concurrent access, which adds coordination overhead rather than accelerating raw execution.

• "Eliminate parallelism" describes removing concurrent execution altogether. Synchronization coordinates access to shared resources while processes continue to run concurrently; it does not force execution back to a purely sequential flow.

• "Increase the number of race conditions" describes producing more instances of unsynchronized, order-dependent access to shared data. Synchronization exists specifically to remove this hazard, not to add to it.

So the option that identifies an actual correctness goal that synchronization mechanisms are designed to guarantee is "Avoid deadlock situations", matching the Bihar STET (Computer Science) 2024 official answer key for this item.