University Course Advice: Life Science UOT?

I am in the process of applying at U of T and i need to choose a major. I have a keen interest in exercise science, and human anatomy, physiology, chemistry and bio. My choices for a major have come down to Health and disease, Neuroscience, Immunology, and Human Biology. Could you please give a background on these, pros cons and help me make a choice. Thanks!

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