The correct answer is option c.

Explanation:

Alma-Ata Declaration: It was adopted at the International Conference on Primary Health Care held in Alma-Ata, USSR in 1978. It recognized the importance of primary healthcare and called for urgent action by all governments, health and development workers, and the world community to protect and promote the health of all people. Therefore, the subject is healthcare of the people.

Hague Convention: The Hague Convention on the Prohibition of the Development, Production and Stockpiling of Bacteriological (Biological) and Toxin Weapons and on their Destruction is an international treaty that prohibits the production, stockpiling, and use of biological weapons. Therefore, the subject is biological and chemical weapons.

Talanoa Dialogue: It is a process designed to help countries increase ambition and accelerate action on climate change by creating a safe and inclusive space for countries to share stories and experiences about climate change. Therefore, the subject is global climate change.

Under2 Coalition: It is a global community of sub-national governments committed to ambitious climate action in line with the Paris Agreement. Therefore, the subject is climate action and not child rights.

Hence, the pairs correctly matched are 1 and 3 only. Therefore, the correct answer is option c.