The merit list for MDCAT (Medical and Dental College Admission Test) is usually prepared by the relevant authorities in Pakistan after the results of the exam are announced. The merit list is based on the marks obtained by the candidates in the MDCAT exam, and it is used to determine the order of admission to medical and dental colleges.

The exact criteria and process for the preparation of the merit list may vary from year to year and from province to province in Pakistan. However, generally, the merit list is prepared based on the following factors:

1. Marks obtained in the MDCAT exam
2. Marks obtained in the SSC, FSC, or A-level

Once the merit list is prepared, it is published on the official website of the relevant authority, such as the Pakistan Medical Commission (PMDC) or the provincial health department.