Yes, you might face an issue even if you get admission to any of the business school in 2024 after appearing for the CAT in 2023. Assuming, that the duration of the MCom programme is two-years. It means that when you get admission to the business school, you will be in the second year of your Master's degree programme (MCom). As of now you cannot pursue two degree courses simultaneously at the same time in regular mode. Therefore, you will be required to leave your MCom degree after the completion of the first year. Secondly, MBA programmes in most of the business schools are the residential programmes. Therefore, it is not possible to pursue two degree programmes at the same time together.