Which is true about isaplpha(c), where c is an int that can be represented as an unsigned char or EOF.isalpha(c) returns?

Both Non-zero if c is alphabetic & 0 if c is not alphabetic

Which is true about isaplpha(c), where c is an int that can be represe

1.	Which is true about isaplpha(c), where c is an int that can be represented as an unsigned char or EOF.isalpha(c) returns?
A.	Non-zero if c is alphabetic
B.	0 if c is not alphabetic
C.	Both Non-zero if c is alphabetic & 0 if c is not alphabetic
D.	None of the mentioned
Answer» D. None of the mentioned

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Which is true about isaplpha(c), where c is an int that can be represented as an unsigned char or EOF.isalpha(c) returns?

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