pallavidutta:
If there is no option in the application to indicate this (and beyond ISB, other schools don't necessarily have this), you can and should indicate it in your CV/resume. You can do this by using a bullet point / line item to indicate your promotion or you can show different date ranges for the positions held within the same company.
If you need help with your CV/resume, feel free to reach out to us for help! We're happy to give it a couple of reads. This might be a good idea given how important your CV/resume is to your overall application.
https://admissionado.com/free-consultation/