Filings of Aluminum, Copper, Iron and Zinc were taken in four different test tubes. To each test tube containing filing; dilute HCl was added serially and test tube was heated. From which test tube we should not expect emergence of any gas?

(1) The test tube containing aluminum filling
(2) The test tube containing iron filling
(3) The test tube containing Zinc fillings
(4) The test tube containing Copper filling​