Hello Ma'am. Commerce is a study of trade and business that encompass each and every process and activity that takes place in any commercial organization at any level. Hence, the various careers that a student can pursue after completing school education mainly revolve around this field. Studying the commerce stream during high school will allow a student to pursue careers in fields such as Finance, Planning, Accountancy, Tax Practitioners, Broking, Banking etc. The vast field of study that comes under the arena of science allows students under this stream innumerable career options. Science involves the systematic study and investigation of all natural phenomena and occurrences by employing various methods such as observation, experimentation, etc. By studying Science after class 10, students can pursue a career in any of the three main subjects in science, namely, Physics, Chemistry and Biology. While some career options may be specific to only one the three subjects under science, most careers might be interdisciplinary and may involve a detailed study of either two or all three of the science subjects. The vast field of study that comes under the arena of science allows students under this stream innumerable career options. Science involves the systematic study and investigation of all natural phenomena and occurrences by employing various methods such as observation, experimentation, etc. By studying Science after class 10, students can pursue a career in any of the three main subjects in science, namely, Physics, Chemistry and Biology. While some career options may be specific to only one the three subjects under science, most careers might be interdisciplinary and may involve a detailed study of either two or all three of the science subjects.