लखनौ करारावर सह्या करून ______ आणि म.अ. जिन्हा यांनी राष्ट्रीय सभा आणि मुस्लीम लीग यांच्यात राजकीय ऐक्य घडवून आणण्याचा प्रयत्न केला.

The correct answer is Option B (Lokmanya Tilak).

Key Points:
• The Lucknow Pact was signed in December 1916 at the joint session of the Indian National Congress and the All India Muslim League held in Lucknow.
• Lokmanya Bal Gangadhar Tilak and Muhammad Ali Jinnah were the chief architects who forged this historic Hindu-Muslim political unity.
• Under the pact, the Congress conceded the League's demand for separate electorates for Muslims in provincial legislative councils in exchange for joint demands for self-government (Swaraj).
• Sarojini Naidu hailed M.A. Jinnah as the 'Ambassador of Hindu-Muslim Unity' for his cooperative leadership alongside Tilak.
• The 1916 Lucknow Session also marked the historic reunification of Moderates and Extremists within the Congress fold under Ambica Charan Majumdar's presidency.
• Key Takeaway: Lokmanya Tilak and M.A. Jinnah signed the historic Lucknow Pact of 1916 to establish unity between Congress and Muslim League.