Final answer:
The ranking method is a comparative method of performance appraisal.
Step-by-step explanation:
The comparative method of performance appraisal is used to evaluate employees based on their performance in relation to others. Out of the options given, the ranking method is a comparative method of performance appraisal. It involves ranking employees from highest to lowest based on their performance levels. This method helps in identifying the top performers and the areas where improvement is needed.