सत्यशोधक समाजाच्या मुंबई शाखेची स्थापना ________ यांनी केली.
(a) रामय्या व्यंकय्या अय्यावारू
(b) नरसिंगराव सायबू वडताळ
(c) जाया यल्लप्पा लिंगू
(d) व्यंकू बाळोजी कालेवार

The correct answer is Option C ((a), (b), (c) and (d)).

Key Points:
• Bombay Branch of Satyashodhak Samaj (1874): Established in Bombay under the guidance of Mahatma Jyotirao Phule to advance social reform among the working masses.
• Telugu Munnurwar/Kamathi Reformers: The branch was spearheaded and financially sustained by prominent Telugu contractors and philanthropists:
• Ramayya Vyankayya Ayyavaru: Industrialist, contractor, and staunch benefactor of Satyashodhak literature.
• Narsingrao Saibu Vadtala: Committed organizer and treasurer/patron.
• Jaya Yallappa Lingu: Builder, philanthropist, and active leader.
• Vyanku Baloji Kalevar (Kalewar): Prominent textile mill manager, organizer, and reformer.
• Publication Support: They pooled financial resources to publish Mahatma Phule's monumental books, including *Gulamgiri* and *Shetkaryacha Asud*.
• Conclusion: All four leaders (a, b, c, and d) were instrumental in establishing the Bombay branch.
• Key Takeaway: The Bombay branch of Satyashodhak Samaj was established by Ramayya Ayyavaru, Narsingrao Vadtala, Jaya Lingu, and Vyanku Kalevar.