क्रांतिसिंह नाना पाटील :
(a) यांनी अस्पृश्यांना मंदिर प्रवेश देण्यास पाठिंबा दिला.
(b) यांच्यावर 1946 मध्ये मध्य प्रांताच्या सरकारने भाषण बंदी लादली.
(c) यांना आचार्य प्र. के. अत्रे यांनी 'क्रांतिसिंह' हे नामाभिधान दिले.

The correct answer is Option C ((a), (b), (c) are all correct.).

Key Points:
• Krantisingh Nana Patil (1900–1976):
• Social Reform & Temple Entry: Deeply influenced by Satyashodhak ideology, Nana Patil actively fought against caste discrimination and supported temple entry movements and dignity for untouchables (Dalits) in Satara and Kolhapur.
• Speech Ban in CP & Berar: Due to his fiery anti-imperialist rhetoric and mass popularity during underground tours in 1946, the British government of Central Provinces and Berar served an order banning him from public speaking within their territory.
• Title 'Krantisingh': Acharya Pralhad Keshav (P.K.) Atre, enthralled by Nana Patil's lion-hearted revolutionary leadership of the Satara Prati Sarkar, bestowed upon him the famous epithet 'Krantisingh' (Lion of the Revolution).
• Therefore, all three statements (a), (b), and (c) are correct (Option 3).
• Key Takeaway: Nana Patil supported temple entry, faced a speech ban in CP & Berar in 1946, and was titled 'Krantisingh' by Acharya Atre.