NDA/ NA 16 year Topic-wise Solved Papers (2006 - 2021) consists of last 16 years (both April and August papers) from 2006 - 2021 solved papers of General Ability Test distributed into 33 topics. In all there are 29 Question papers (2006 April - 2021 April). General Ability Test is divided into 2 parts - English and General Knowledge. English is divided into 9 topics whereas General Knowledge is divided into 7 Units - Physics, Chemistry, Biology, History, Polity, Geography and General Awareness - which are further divided into 24 topics. The book contains 4350 MCQ’s (1450 in English & 2900 in GK) from the above 29 Question papers. The strength of the book lies in the originality of its question papers and Errorless Solutions. The solution of each and every question is provided in detail (step-by-step) so as to provide 100% concept clarity to the students.