What are some the most pursed majors? Why?

Computer Science , Business Management and Medical streams are the popular ones. I would suggest you first figure out what is it you want to study and then go for it. This way studies won't be a burden to you and you will have fun learning as well.

You can refer following link for more insight:

https://www.niche.com/blog/the-most-popular-college-majors/

https://www.cnbc.com/2017/12/15/the-6-most-popular-college-majors.html

Computer science tops the list. Lots of interesting problems, flexible learning paths, and strong demand for CS graduates. For a summary, see www.princetonreview.com/college-advice/top-ten-college-majors. Finally, if possible, study topics that interest you, you'll be more energized and come up with creative solutions. All the best.