प्रार्थना समाजाबाबत पुढीलपैकी कोणती विधाने बरोबर आहेत ?
अ. दादोबा तर्खडकर, डॉ. आत्माराम पांडुरंग, वामन आबाजी मोडक, भाऊ महाजन, इत्यादींनी 31 मार्च 1867 रोजी मुंबई येथे प्रार्थना समाजाची स्थापना केली.
ब. प्रार्थना समाजामार्फत 'सुबोध पत्रिका' सुरू केली.
क. प्रार्थना समाजाच्या माध्यमातून ना. म. जोशी यांनी मजुरांची स्थिती सुधारण्यासाठी 'सोशल सर्व्हिस लीग'ची स्थापना केली.
ड. प्रार्थना समाजाने मुंबई, सोलापूर, कोल्हापूर येथे महाविद्यालयांची स्थापना केली.

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

Key Points:
• Prarthana Samaj was founded on 31 March 1867 in Bombay under the influence of Keshub Chandra Sen.
• Founders included Dr. Atmaram Pandurang, Dadoba Tarkhadkar, Vaman Abaji Modak, Bhau Mahajan, and later joined by Justice M.G. Ranade and R.G. Bhandarkar (Statement a is correct).
• The mouth-piece organ of Prarthana Samaj was 'Subodh Patrika' started in 1873 to spread religious and social reform principles (Statement b is correct).
• Narayan Malhar (N.M.) Joshi, a key member, established the 'Social Service League' in 1911 under the aegis of social upliftment ideas associated with Prarthana Samaj to improve labor welfare (Statement c is correct).
• Statement d is incorrect because Prarthana Samaj established night schools and orphanages (like Pandharpur Orphanage), but not a network of colleges in Mumbai, Solapur, and Kolhapur.
• Revision Note:
• Prarthana Samaj was founded in Bombay on 31 March 1867; it published 'Subodh Patrika' and N.M. Joshi initiated the Social Service League under its reformist ideology.