The Excel CHOOSECOLS function returns specific columns from an array or range. The columns to return are provided as numbers in separate arguments. Each number corresponds to the numeric index of a column in the given array.
https://exceljet.net/excel-functions/excel-choosecols-function
Returns the specified columns from an array.
https://support.microsoft.com/en-gb/office/choosecols-function-bf117976-2722-4466-9b9a-1c01ed9aebff