On 11 September 2021, the world marked which anniversary of the 9/11 attacks?

A. 18th
B. 20th
C. 22nd
D. 24th


Correct Answer: B. 20th

Detail About MCQs

The September 11 attacks, also commonly referred to as 9/11, were a series of four coordinated terrorist attacks by the militant Islamist terrorist group al-Qaeda against the United States of America on the morning of Tuesday, September 11, 2001.