A classification referring to the fourth beneficial or favorable assembly or category of things or people.

चौथे सकारात्मक समूह

English Usage: The fourth positive group of test results showed significant improvement in the experiment.

Hindi Usage: परीक्षण परिणामों के चौथे सकारात्मक समूह ने प्रयोग में महत्वपूर्ण सुधार दिखाया।