Will the following C code compile without any error?#include

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Will the following C code compile without any error?

#include <stdio.h>
    int main()
    {
        int n;
        {
            int n;
            for (n = 0; n < 12; n++);
        }
    }

1. No
2. Yes
3. Depends on the C standard implemented by compilers
4. All of above
5. None of these

There can be blocks inside the block. But within a block, variables have only block scope.