Correct option is A
The correct answer is (a).. A, B, C, D, E.
Chronological Breakdown of Publications
• A. Annihilation of Caste — Published in 1936 (written as a speech for the Jat-Pat Todak Mandal conference).
• B. Who were Shudras? — Published in 1946 (subtitled How they came to be the Fourth Varna in the Indo-Aryan Society).
• C. States and Minorities — Published in 1947 (submitted as a memorandum on Fundamental Rights to the Constituent Assembly).
• D. The Untouchables — Published in 1948 (subtitled Who Were They and Why They Became Untouchables?).
• E. The Buddha and His Dhamma — Published posthumously in 1957 (Dr. Ambedkar's treatise on Buddhism completed shortly before his death in 1956).