Last (Nonvirtual) meeting of the World economic forum held on:

The correct answer is 20-24 January 2020 because this session was the final traditional, fully in-person annual winter summit held in Davos before the COVID-19 pandemic caused global shutdowns.

• 20-24 January 2020: This is the correct choice. The 50th World Economic Forum (WEF) Annual Meeting took place physically in Davos-Klosters, Switzerland. Following this session, subsequent summits transitioned to online formats or altered schedules due to virus mitigation strategies.


• Incorrect Options:
  
  
  
  • 17-21 January 2022: This is incorrect. This specific January session was conducted entirely as a virtual conference under 'The Davos Agenda' banner. The actual in-person return to Davos was delayed until a special rescheduled meeting took place in May 2022.
  
  
  • 17-20 August 2021: This is incorrect. This does not represent a standard winter or foundational assembly period for the institution.