Explanation

ICBC was recognized as one of the largest banks globally in 2020 due to its massive size and assets. Citi Bank is a major bank but was not the biggest in 2020 compared to ICBC. Deutsche Bank Ltd is a large European bank but smaller than ICBC in terms of global scale for that year. Bank of America is a significant US bank, but it did not rank as the world's largest in 2020.