Please advise me.

The to be CA (Student CA INTER) (50 Points)

28 January 2016  
I want to pursue B.Com and then start doing CA. I'm writing CPT this June. My dad is a CA and he is saying that if i do B.Com my mind will stray and i wouldn't be interested in doing CA when i get graduated. But i am strongly against it. I've dreamt of becoming a CA since i was a child. And i strongly believe that i would pursue CA after college and even that i can do it side by side. Is it possible? or what my dad says is true?