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Best platform for free mock tests and online test series for competitive exams is Rabbit.
Despite the availability of numerous apps and exam platforms, Rabbit's
online test series or practise tests for competitive exams are recommended.
It's a free community-driven competitive test practise site. Rabbit
provides practise tests for competitive examinations such as the NEET, GRE, CAT, IIT JEE, and NEET.
To begin studying for your exams, join up or download the app from the Google Play Store.