Hello Souhardya Panda. Thanks for contacting Careers360 and we hope we will be able to answer your query. 

I am not very sure as I have not written NATA before. Maybe, somebody may be able to provide you a better answer. But, I will still suggest you to give a try and contact the NATA authorities here:

India Habitat Centre, Core 6A, 1st Floor,
Lodhi Road, New Delhi-110003 India
Specific Query related to NATA-2018 Examination
Email: info.tcsionhub@tcs.com

Please explain your situation and do it as quickly as possible since you have only 3 weeks left for the exam.

Hope this helps you and all the best!