ctype.h is associated with character classification and character-handling functions.
Programming in C MCQ - Library & Header Files
time.h provides declarations and types associated with date and time operations.
stdlib.h is associated with general utility functions. The presentation identifies it as the appropriate header among these choices.
According to the presentation, header files are divided into two broad types. The answer follows that source-specific classification.
The presentation describes two broad groups: header files written by the programmer and header files supplied with the compiler.
