@anjal , you are in 9th grade. I can promise you 100% that taking physical science now will not keep you out of a good college.
There are 2,000 non-profit colleges which confer MA or MS degrees. At least 500 of them are great colleges, which will prepare you for life, including for going on to do a PhD.
Finally, what does your guidance counselor say? That is the person to ask which classes you should take, and that is the person who should have sat down with you, and set out a four-year plan of classes ( all which can be changed, of course).