Explanation:

Correct option 4: 162

A total of 162 countries participated in the Tokyo 2020 Paralympic Games, which took place from August 24 to September 5, 2021 (originally scheduled for 2020 but postponed due to the COVID-19 pandemic).

This edition of the Paralympics featured 4,403 athletes competing in 22 sports. It was a landmark event with the participation of athletes from all over the world, showcasing the incredible achievements of those with disabilities.

The Tokyo 2020 Paralympics were also notable for the increased visibility and inclusion of athletes with various disabilities, making it one of the most celebrated Paralympic Games in history.