A blood sample is left on a phlebotomy tray for 4 hours before it is delivered to the laboratory. which group of tests could be performed reliably

Uric Acid, BUN and creatinine test can be performed when a sample of blood is left on the phlebotomy tray for 4 hours before it is being delivered to the laboratory. Conducting these four test will ensures the reliability. Therefore these test can be performed reliably.