Hi aspirant,

According to the current age limit criteria for appearing in CDS examination a candidate needs to be aged between 19 to 25 years for being eligible. Since you will become 25 years old by the end of 31st December this year, so you this year will be marked as your last attempt. Following below is the overview of the examination in tabular form:

CDS Eligiblity Criteria 2021 - Overview

For more information about the same, visit https://competition.careers360.com/articles/cds-eligibility-criteria

Hope it helps!!