Explanation:

- Option 1: Vinoba Bhave

- An Indian advocate of non-violence and human rights.

- Known for the Bhoodan Movement, not for writing "Gulamgiri".

- Option 2: Jyotiba Phule

- A prominent social reformer and thinker.

- Wrote "Gulamgiri" in 1873 to advocate for equality and against caste oppression.

- Fought against the social injustices faced by lower castes.

- Option 3: Swami Dayanand Saraswati

- The founder of the Arya Samaj movement.

- Known for his work on reviving Vedic knowledge, not for "Gulamgiri".

- Option 4: Swami Vivekanand

- A disciple of Ramakrishna Paramahamsa.

- Best known for introducing Vedanta to the Western world, not for "Gulamgiri".