Correct option is B
The correct chronological order is B, D, A, C.
(B) "The Problem of the Rupee: Its Origin and Its Solution" was published in 1923. This work discusses the issues related to the currency system in British India, showcasing Ambedkar's expertise in economics.
(D) "Annihilation of Caste" was originally written in 1936 as a speech for the Jat-Pat Todak Mandal, but it was never delivered. Later, it was self-published by Ambedkar. This work criticizes the Hindu caste system and orthodox Hinduism, calling for the annihilation of caste.
(A) "What Congress and Gandhi Have Done to the Untouchables was published in 1945. This book critically examines the role of the Indian National Congress and Mahatma Gandhi in addressing (or failing to address) the issues faced by the untouchables in India.
(C) "The Buddha and His Dhamma" was Ambedkar's last work, published posthumously in 1957. This book outlines Ambedkar's interpretation of Buddhism and his presentation of the Dhamma.