Write SQL query to solve given problem: Indicate the name of the customers who have placed an order of 3 units in February 2018.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T FROM ( SELECT DISTINCT CASE  WHEN T2.`Order Quantity` = 3 AND T2.OrderDate LIKE '2/%/18' THEN T1.`Customer Names` END AS T FROM Customers T1 INNER JOIN `Sales Orders` T2 ON T2._CustomerID = T1.CustomerID ) WHERE T IS NOT NULL