Correct Answer : Option (A) - UNICEF
Note : UNICEF is launching a new global campaign on 24 April, called #Vaccineswork. The objective of the campaign is to emphasize the power and safety of vaccines among parents and wider social media users. The campaign will be running alongside World Immunization Week from 24 to 30 April to spread the message that together communities, including parents, can protect everyone through vaccines. #VaccinesWork has long been used to bring together immunization advocates online. This year, UNICEF is partnering with the Bill & Melinda Gates Foundation, the World Health Organization (WHO), and Gavi, the Vaccine Alliance to encourage even greater reach.