Final answer:
The SQL MAX function is used to obtain the largest value in a column.
Step-by-step explanation:
In an SQL query, the built-in function used to obtain the largest value of numeric columns is c) MAX. The MAX function can be applied in a SELECT statement to find the biggest number in a specified column. For example, if you have a table named 'Sales' with a column 'Amount', you would use SELECT MAX(Amount) FROM Sales; to get the highest sale amount recorded in that table.