A. Books:
1. Pathfinder for NDA & NA Entrance Examination by Arihant Publications: This book covers all the sections of the NDA & NA exam with detailed explanations and practice questions.
2. Mathematics for NDA and NA (National Defence Academy and Naval Academy) by R.S. Aggarwal: A comprehensive book covering the mathematics syllabus of the NDA & NA exam with plenty of solved examples and practice questions.
3. Objective General English by S.P. Bakshi: This book is helpful for the English section of the General Ability Test (GAT). It covers grammar rules, vocabulary, and comprehension exercises.
4. Manorama Yearbook: This annual publication covers various topics like current affairs, general knowledge, and updates on various fields. It's useful for preparing for the General Knowledge section of the NDA & NA exam.
5. NCERT Books: For Mathematics and General Science, refer to NCERT textbooks from classes 6 to 12. They provide a solid foundation and cover the basic concepts required for the exam.
=============================
B. Websites:
1. ClearIAS: ClearIAS offers free study materials, mock tests, and guidance for UPSC exams, including NDA & NA. Their website is a valuable resource for aspirants.
2. Jagran Josh: Jagran Josh provides study materials, previous year papers, and current affairs updates helpful for NDA & NA exam preparation.
3. UPSC Official Website: The official website of the Union Public Service Commission (UPSC) provides exam notifications, syllabus, and previous year question papers. It's a reliable source for exam-related information.
4. SSB Crack: This website offers study materials, tips, and guidance specifically for the SSB interview, which is an integral part of the NDA & NA selection process.
5. YouTube Channels: There are several YouTube channels dedicated to UPSC exam preparation, offering video lectures, tips, and strategies. Some popular channels include Unacademy, Study IQ Education, and Let's Crack UPSC CSE.