Explanation:

- The International Day of the Girl Child is observed annually to highlight and address the rights and challenges faced by girls around the world.

- The United Nations General Assembly designated October 11th as the International Day of the Girl Child in 2011.

- Option 4: 11 October is the correct answer as the day is celebrated on the 11th of October every year.

- Option 1: 14 October, Option 2: 12 October, and Option 3: 13 October are incorrect dates for this observance.

- The day aims to promote the empowerment of girls and the fulfillment of their human rights, while also addressing issues such as gender inequality and access to education.