Hello student yes you're eligible as you're completing 24 year age on 26 December 2020.
Which is around 9 months away.
The age eligibility is candidates must be between 20-24 year of age.
Qualification eligibility - candidates must have a degree in engineering from a recognized university/institution.
For more updates refer to the link mentioned below
https://www.google.com/amp/s/competition.careers360.com/articles/cds-eligibility-criteria/amp

Feel free to comment if you have any doubt
Good luck

Combined Defence Services Examination

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