Concept:
The Satya Shodhak Samaj (Society of Truth Seekers) was founded to promote social equality and fight against caste discrimination, untouchability, and social injustice in India.
• It was established in 1873.
• Its main aim was to secure social justice for lower caste communities.
• It worked for education, equality, and removal of caste-based oppression.
Step 1: Recall the founder of Satya Shodhak Samaj.
Mahatma Jyotirao Phule founded the organization in:
\[
1873
\]
Thus,
Founder = Mahatma Jyotirao Phule
Hence, the correct answer is:
\[
\boxed{\text{Mahatma Jyotirao Phule}}
\]