as per revised design of question paper text Delhi VK Global Publications 2019 15th. rev. ed. monographic 616p. 26 cm.(pbk) ill. basic concepts, NCERT questions, previous year's questions, proficiency exercise for extended learning, CBSE sample question paper-2018(solved), CBSE examination paper-2018(solved) compiled by Editorial Board 574 9789387958500 B-705485 PANSY BOOKS(RP) 20180912152512.0