Detailed Explanation:

The Har Ghar Tiranga Abhiyan was launched by the Central Government as part of Azadi Ka Amrit Mahotsav to celebrate India's 75th Independence Day.

• Key Initiative: The campaign encouraged citizens to bring the Tiranga home and hoist it, promoting patriotism and Jan Bhagidari (public participation).
• Implementation: States, UTs, ministries, NGOs, and self-help groups actively supported this central government initiative.
• Therefore, the Central Government initiated this campaign, making Option 3 the correct answer.