The correct answer is: A. 11 December
The United Nations General Assembly designated 11 December as the International Day of Solidarity with the Palestinian People in 1977. The day is observed to express support for the Palestinian people’s struggle for self-determination, independence, and the establishment of an independent State of Palestine with East Jerusalem as its capital.
Option B, 29 November, is the International Day of Solidarity with the People of South Africa.
Option C, 3rd Sunday of November, is the International Day for Tolerance.
Option D, 9 August, is the International Day of the World’s Indigenous Peoples.