Hello Shubham,
There is no fixed syllabus for the entrance exam.
Only your right of reasoning and conscience will help you in the entrance. Practice basic reasoning, practice how to write an essay, data analysis, pictorial representation, abstract writing, report writing. Study the culture, art, geography, history and general science of all those countries which comes under your choice of cluster, You can buy JNU entrance book (R. Gupta ) available on all e-commerce and retail stores.
ALL THE BEST!!
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