Dear Sowmya,

Below I am mentioning the best books and Youtube channels that can help you in the preparation NDA.

For Mathematics:-

• NCERT of 11th and 12th
• Quantitative Aptitude for competitive examinations by RS Agarwal
• Mathematics for NDA/NA: National Defence Academy and Naval Academy by RS Agarwal

For English:-

• Objective General English by SP Bakshi
• Wren & Martin High School English Grammar and Composition by S chand
• Word Power Made Easy by Norman & Lewis

For General science, History and Geography:-

• Objective General Knowledge by Lucent Publications
• General Knowledge 2021 by Arihant Publication

For Physics:-

• NCERT books for Class 11th and 12th

For Physics:-

• NCERT books for Class 11th and 12th

For Current affairs:-

• Manorama Yearbook, Pratoyogita Darpan etc.

Let us have a look on best Youtube channels for NDA preparation:-

• For Maths - Neha Agrawal Mathematically Inclined
• For current affairs - BYJU'S IAS

There are not so many Hindi Youtube channels for NDA preparation, but you will find that there are very few when it comes to English and Tamil Youtube channels for NDA. I suggest you to search the channels yourself and try them because you know what suits you in terms of teaching style.

To know the preparation tips for NDA, you can also go through the link below.

https://competition.careers360.com/articles/how-to-prepare-for-nda

To know updates of NDA 2021, you can visit our website by clicking on the link below.

https://competition.careers360.com/exams/nda

I hope this answer helps you.

All the very best!!