Which of the following format identifier can never be used

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Which of the following format identifier can never be used for the variable var?

#include <stdio.h>
    int main()
    {
        char *variable = "Advanced Training in C by interviewmania.com";
    }

1. %s
2. %c
3. %d
4. %f
5. None of these

Correct Option: D

%c can be used to print the indexed position.
%d can still be used to display its ASCII value.
%s is recommended.
%f cannot be used for the variable var.