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If you're enquiring for legal reasoning in reference to CLAT then passages of around 450 words will be provided in the exam related to fact, situation or scenario pertaining to legal matters, questions of public policy, moral philosophical questions with 35-39 questions of 25% of the total paper. Since this section include reading passages, so improve upon your reading skills, for this go through newspaper every day such as The Hindu with especial emphasis on the editorial part which will help you in the comprehension skills along with both dynamic and static legal issues of past one year such as important cases, landmark judgment, contemporary issues, amendments and enactments of both session of parliament etc,
secondly be acquainted with important laws such as torts law, contract law, IPC and legal maxims, terms etc, you can also watch YouTube channels of top law universities or even prolific people in the field of law, you can go through Legal Aptitude and Legal Reasoning by A P Bhardwaj or
Legal Awareness and Legal Reasoning by Pearson for legal reasoning, time management is very crucial here, hence you must go through mock tests on regular basis, you can go through last year sample paper at https://consortiumofnlus.ac.in/clat-2021/ug-sample-questions.html for more details regarding this.