CHOOSEReturns an element from a list of choices based on index.
CHOOSE(index, choice1, [choice2, …])
index – Which choice (of the up to 29 provided) to return.
If index is zero, negative, or greater than the number of choices provided, the #NUM! error is returned.
choice1 – A potential value to return. Required. May be a reference to a cell or an individual value.
choice2, … – Additional values among which to choose.
OFFSET: Returns a range reference shifted a specified number of rows and columns from a starting cell reference.
Uses an index to return a value from the specified list of up to 30 values.