Combined defence services Examination [CDS] is one of the best opportunities in the lives of the Candidates who are preparing for the military examinations. This exam is conducted by the Union Public services Commission (UPSC) twice a year in the month of February and November to conduct officers in the defence forces: Indian Army, Indian Navy & Indian Air Force. The 2020-21 edition of ?CDS chapter wise/ Sectionwise solved papers? is one point solution for that provides the practice of complete syllabus. The book divides the entire syllabus into 4 major sections; elementary Mathematics, English, Science & General Studies and every section has been sub-divided into chapters for thorough practice. Housed with such customized study material for effective and robust preparation, It is a highly approachable book to get the real knowledge of exam pattern, level of toughness and trends of questions to perform best in the exam. Br>table of Contents elementary Mathematics, English, Science & General Studies.