Correct option is A
The correct match for the authors and their books is (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv).
(a) Dadabhai Naoroji is the author of (ii) Poverty and the Unbritish Rule in India. This book was a seminal work in which he put forth his "drain theory," arguing that British colonial rule was impoverishing India.
(b) J.L. Nehru (Jawaharlal Nehru) is the author of (i) Discovery of India. He wrote this book during his imprisonment at Ahmednagar Fort from 1942 to 1945.
(c) Maulana Azad is the author of (iii) India wins Freedom. This is an autobiographical account of India's struggle for independence and the partition from his perspective.
(d) R.C. Dutt (Romesh Chunder Dutt) is the author of (iv) Economic History of India. This two-volume work provides a detailed account of India's economic history under British rule.