You can choose either of them as the prospects are good for both Commerce and Science sectors. You need to take a call  because the career is yours and yours alone. But if you are in a fix and what might suit you based on your interests or your personality, we would suggest you to take up an Personality Profile tests that are available free online. You need to answer the questionnaire and based on the answers, the possible career options will be suggested. Based on that you can select between Science and Commerce.