How many characters for pushback is guaranteed per file while using ungetc(c, fp);?

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answerhappygod
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How many characters for pushback is guaranteed per file while using ungetc(c, fp);?

Post by answerhappygod »

a) Only 1 character
b) Characters within 1 word
c) Characters within 1st new-line
d) All characters upto NULL character
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