Correct Answer: (b) Barcelona, Spain
Solution:The GSMA Mobile World Congress was held in Barcelona, Spain between February 26 to March 1, 2018. It was also held in Spain between 25th-28th February, 2019. MWC23 Barcelona will took place from 27th February to 2nd March, 2023 in Barcelona. Mobile World Congress 2024 was held between 26-29 February, 2024 in Barcelona.