What should I choose as a minor with my Mechanical Engineering major?

I need your help choosing a minor with my Mechanical Engineering major which will help me diversify my job opportunities.

The options that I have infront of me are
1.Mechatronics
2.Biomedical Engineering
3.Aerospace

which one would be the best option.

The one that you GENUINELY are most interested in. Seriously. Work on having diverse internships- that will matter more than the ‘minor’ on your transcript