No, you cannot pursue an MBA course directly after Intermediate studies or Class 12. If you wish to pursue an MBA, then you must at least hold a Bachelor's degree or equivalent qualification from a recognised university. According to the official website of the CAT, to appear for the entrance examination, candidates must hold a Bachelor’s Degree with at least 50% marks or equivalent CGPA (45% marks for candidates who belong to the SC, ST and PwD category) from a recognised university.