C Programming
What is the difference between a declaration and a definition of a variable?

Both can occur multiple times, but a declaration must occur first.
There is no difference between them.
Both can occur multiple times, but a definition must occur first.
A definition occurs once, but a declaration may occur many times.
A declaration occurs once, but a definition may occur many times.

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C Programming
Which of the following statements are correct about the program below?#includevoid main(){ int size, i; scanf("%d", &size); int arr[size]; for(i=1; i<=size; i++) { scanf("%d", arr[i]); printf("%d", arr[i]); }}

None of these
The code is correct and runs successfully.
The code is erroneous since the subscript for array used in for loop is in the range 1 to size.
The code is erroneous since the values of array are getting scanned through the loop.
The code is erroneous since the statement declaring array is invalid.

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