7 ऑगस्ट, 1947 हा दिवस "भारतीय संघात सामील व्हायचा दिवस" म्हणून पाळावा असे ___ यांनी हैदराबाद संस्थानातील लोकांना सांगितले.

The correct answer is Option A (Swami Ramanand Tirth).

Key Points:
• Hyderabad Liberation Struggle (1947–1948):
• When Nizam Mir Osman Ali Khan declared his intentions to maintain Hyderabad as an independent sovereign entity rather than acceding to the Indian Union in August 1947, the Hyderabad State Congress launched a massive resistance movement.
• Swami Ramanand Tirth, the President and supreme leader of the Hyderabad State Congress, gave a clarion call to the entire populace across Marathwada, Telangana, and Hyderabad to observe 7 August 1947 as 'Join Indian Union Day' (भारतीय संघात सामील व्हा दिन).
• Public meetings were organized, Indian tricolor flags were hoisted in defiance of Nizam's bans, and a Satyagraha pledge was administered, which eventually culminated in Police Action (Operation Polo) in September 1948.
• Key Takeaway: Swami Ramanand Tirth called upon the people of Hyderabad to observe 7 August 1947 as 'Join Indian Union Day'.