"Jago grahak jago" is a campaign launched through multimedia awareness by:

Option 1 -> The Department of Consumer Affairs under the Government of India is the nodal agency responsible for consumer protection and awareness initiatives, including the "Jago Grahak Jago" campaign.

Option 2 -> This is not the correct name of the department. There is no "Directorate of Consumer Affairs" under GOI that launched this campaign.

Option 3 -> The Department of Consumer Interests does not exist as an official department under the Government of India.

Option 4 -> While consumer protection is a function, this is not the official name of the department that launched the campaign.

Hence, Option 1: Department of Consumer Affairs, GOI -> The "Jago Grahak Jago" (Awaken Consumer Awaken) is a nationwide multimedia consumer awareness campaign launched by the Department of Consumer Affairs, Ministry of Consumer Affairs, Food and Public Distribution, Government of India to educate consumers about their rights and responsibilities -> correct