We have a data frame with a column called 'city' containing city names. We also have a dictionary where the keys are city names and values are the corresponding states.

If we want to add a column in the original data frame containing the state corresponding to each city in 'city' we would use which of the following function?

Select one:

a$.$ lookup$()$

b$.$ vlookup$()$

c$.$ match $()$

map$()$