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The function of strcspn is

  1. Returns the first position in a string that contains a character not in another string

  2. Matches one string in another using glob style matching

  3. Returns the position of the character that's lowest in the ASCII set in a given string

  4. None of the Above
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A Correct answer
Explanation

strcspn() returns the length of the initial segment of the first string that does NOT contain any characters from the second string - effectively finding the first position with a character not in the other string. It does not perform glob matching or find ASCII minimum positions.

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