Discussion
Which among the given options compares at most n characters of string ch to string s?
Answer: A
Correct answer: int strncmp(ch, s, n)
strncmp is the bounded form of strcmp: it compares at most n characters, stopping early at a difference or at a terminating null. The order of the first two arguments matters only for the sign of the result, but the question asks for ch compared to s, so ch comes first.
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