There no such in particular syllabus for BA Psychology entrance test. Infact there's no particular test assigned for this course in Jamia Millia Islamia University.
There's is a group of courses which comes under Faculty of Social Science, which includes honors in Political Science, Sociology, Geography, Psychology and General BA. And there's only one entrance test for getting admission in any of these above mentioned courses.
If you'll get selected for admission, then you'll given a course based on your ranking and the preferences you had already opted at the time of filling your entrance forms.
You just need to prepare according to the syllabus prescribed in the University’s prospectus, which is easily accessible from the official website of the University.