The correct answer is: Job description

Rationale: This is job description rather than job analysis, because a job description is the statement produced from a process of job analysis. This is job description rather than personnel specification, because it addresses the requirements of the job, rather than the qualities of the ideal job holder or person. Job advertisement is just a distractor.

Pitfalls: The difference between job description and personnel specification has cropped up frequently in exams over the years. There is potential for confusion: remember that one describes the 'job', the other the 'person'.