Introduction:
Rashsundari Devi was a Bengali writer and the first Indian woman to write an autobiography in Bengali. Her autobiography, titled "Amar Jiban" (My Life), is a significant literary work that provides insights into the life of a woman in 19th-century colonial Bengal. Among the given options, option 'A' correctly identifies "Amar Jiban" as the autobiography of Rashsundari Devi.

Explanation:
Rashsundari Devi's autobiography, "Amar Jiban," is a remarkable literary work that offers a unique perspective on the life experiences of a woman in colonial Bengal. The autobiography was written in Bengali and was published in the year 1876. It is considered a pioneering work in Indian literature as it is the first autobiography written by an Indian woman.

Importance of "Amar Jiban":
Rashsundari Devi's "Amar Jiban" holds immense importance in the literary and cultural history of Bengal. It provides a valuable account of the socio-economic conditions, customs, and traditions prevalent during the 19th century. The autobiography also sheds light on the challenges and struggles faced by women in a patriarchal society.

Content of "Amar Jiban":
The autobiography narrates Rashsundari Devi's journey from her childhood to her married life. It reflects her experiences as a young girl growing up in a conservative family, her education, and her eventual marriage. The book also delves into the cultural practices, rituals, and beliefs prevalent in society during that time.

Impact and Legacy:
Rashsundari Devi's autobiography, "Amar Jiban," has had a significant impact on Indian literature. It has paved the way for many other women writers to share their life experiences and perspectives. The book has also become an important resource for historians, sociologists, and scholars studying the social history of Bengal and the role of women in society.

Conclusion:
The autobiography "Amar Jiban" is the notable work of Rashsundari Devi, the first Indian woman to write an autobiography in Bengali. It provides valuable insights into the life of a woman in 19th-century Bengal and remains an important literary and cultural contribution.