________ pandemics had occurred in 1920s ?

a) The Spanish Flu
b) First Cholera Pandemic
c) Great Plague of London
d) Great Plague of Marseille

The Spanish Flu pandemic had hit the world in between 1918-1920, during the end of the First World War. The flu killed more than 50 million people across the globe. It was first reported in Europe and then it spread to other continents.