Who wrote the book ‘Gulamgiri’?

The correct answer is Jyotiba Phule.

Step-by-step Explanation:

1. 'Gulamgiri' (which translates to 'Slavery') is a famous book written in 1873 by Mahatma Jyotirao Govindrao Phule (Jyotiba Phule).

2. The book is a critique of the caste system in India and was dedicated to the American movement to end slavery, linking the struggles of the lower castes in India to the African Americans in the United States.

3. Jyotiba Phule was a prominent social reformer, thinker, and anti-caste activist from Maharashtra who also founded the Satyashodhak Samaj to attain equal rights for people from lower castes.