Consider a memory management scenario where a system has a total memory size of $1000KB$ and allocates memory in blocks of $100KB.$ Initially, the memory is completely free and available for allocation. Students are requested to perform the following tasks:

Allocation Scenario:

Assume the following memory allocation requests are made:

Process A requests $250$ KB of memory.

Process $B$ requests $300KB$ of memory.

Process $C$ requesitis $150KB$ of memory.

Process D requests $200$ KB of memory.

Allocate memory for each process using the "First Fit" and "Best Fit" allocation strategy.

After allocation, calculate and display the amount of internal fragmentation for each process, if any.

Deallocation Scenario:

Assume that Process B completes its execution and releases the allocated memory.

Now deallocate memory previously allocated to Process B$.$

After deallocation, calculate and display the amount of external fragmentation, if any, in the memory system.

Which strategy overall was a better choice for the scenario? Explain your answer.