Looking Up Data $-$ INDEX$()$ & MATCH$()$

Which of the following statements describes how the INDEX$()$ and MATCH$()$ functions are combined to lookup data?

INDEX$()$ is used within the MATCH$()$ function to return the relative position of the data in the lookup table

MATCH$()$ is used to match values from the lookup table and the source table, INDEXO returns the index of these values

MATCH$()$ is used within the INDEX$()$ function to return the relative position of the data in the lookup table

INDEXO Calculates the relative position of the data in the source table and returns values for MATCHO to lookup