The correct answer is option 'B', Jyotirao Govindrao Phule.

Satyashodhak Samaj, also known as the Society of Truth Seekers, was founded by Jyotirao Govindrao Phule in Maharashtra, India. Jyotirao Phule was a social reformer, thinker, and writer who dedicated his life to the upliftment of marginalized and oppressed sections of society, particularly the lower castes and women.

Now let's delve into the details of the founding of Satyashodhak Samaj and the significance of Jyotirao Phule's work.

1. Jyotirao Phule's Background:
- Jyotirao Phule was born in 1827 in Pune, Maharashtra, into a family belonging to the Mali caste, which was considered a lower caste at that time.
- Despite facing discrimination and limited access to education, Phule managed to educate himself and became well-versed in various subjects.

2. Founding of Satyashodhak Samaj:
- In 1873, Jyotirao Phule founded the Satyashodhak Samaj with the aim of challenging the prevailing social and religious inequalities in Indian society.
- The organization's name, Satyashodhak Samaj, can be translated as the Society of Truth Seekers, which reflects its objective of seeking truth and justice.
- The Samaj aimed to promote education, social equality, and the empowerment of marginalized communities.

3. Objectives and Principles:
- Satyashodhak Samaj was established with a set of principles and objectives aimed at bringing about social transformation.
- It aimed to eradicate caste discrimination and promote equality among all individuals, regardless of their caste or gender.
- The Samaj also advocated for women's rights and education, challenging the prevailing patriarchy and oppressive practices faced by women in society.

4. Activities and Impact:
- Satyashodhak Samaj actively engaged in social reform activities, such as opening schools for girls and lower-caste children, promoting widow remarriage, and fighting against social evils like child marriage and untouchability.
- The organization played a crucial role in spreading awareness about social issues and challenging oppressive social norms.
- Jyotirao Phule, along with his wife Savitribai Phule, who was also a prominent social reformer and educator, worked tirelessly to uplift the marginalized sections of society.

5. Legacy and Significance:
- Jyotirao Phule's work and the establishment of Satyashodhak Samaj had a significant impact on Indian society.
- His efforts laid the foundation for the social reform movements that emerged during the colonial period and inspired future generations of social reformers.
- Phule's emphasis on education, social equality, and women's rights continues to be relevant and influential in contemporary India.

In conclusion, Jyotirao Govindrao Phule founded Satyashodhak Samaj as a platform to challenge social inequalities and promote education, social equality, and women's rights. His work as a social reformer continues to inspire and shape the discourse on social justice and equality in India.

Jyotirao Govindrao Phule along with his followers, formed the Satyashodhak Samaj (Society of Truth Seekers) to attain equal rights for people from exploited castes. People from all religions and castes could become a part of this association which worked for the upliftment of the oppressed classes.