Answer: a)Exception
Explanation: Exception is the occurrence of an situation in the computer system field due to which interruption is caused in the execution of the program. A object is created in this event known and the exception object that contains the information about the error that has occurred.
The exception is handled by the exception handler.It catches the exception during the execution or after run time. Other options are incorrect because they are not the unexpected event to disorder the flow of program.Thus the correct option is option(a).
