To answer this question, let's go through each option to determine which one is not a test management tool:
Option A) RTH-Turbo - This option is incorrect because RTH-Turbo is a test management tool.
Option B) Bugzilla - This option is incorrect because Bugzilla is not a test management tool. It is a bug tracking system.
Option C) QC - This option is incorrect because QC (Quality Center) is a test management tool developed by Micro Focus.
Option D) RPT - This option is correct. RPT (Rational Performance Tester) is not a test management tool. It is a performance testing tool developed by IBM.
Therefore, the correct answer is D) RPT. This option is not a test management tool.