You are eligible for 1 to 2 chances for Combined Defence Services OTA. The maximum age limit for a person to apply for Combined Defence Services OTA is 25 years. As you are born in the month of July of 1998 your age is now 23 years 7 months. The minimum age for applying for Combined Defence Services OTA post is 19 years. The age limit for male and female candidates. You must have completed your bachelor's degree from a recognised University for being eligible for applying for Combined Defence Services OTA.

Read also about Combined Defence Services:

https://www.google.com/url?sa=t&source=web&rct=j&url=https://competition.careers360.com/exams/cds/amp&ved=2ahUKEwjgo7qEoZb2AhUbe94KHfHrBaQQFnoECBIQAQ&usg=AOvVaw16i9wNpQnvfE44GboBuQA7