Hello Aspirant,
In order to take admission to the BSc Physics stream in a college, the eligibility criteria are that you should have physics as your paper in 12th grade and pass all your exams with an aggregate of 60%. Since you are from the Arts background in 12th grade, you are not eligible for admission into the BSc Physics stream for your Bachelors.
Foreign Universities are even more strict when it comes to admissions in the STEAM (Science) field because they look into your credits from a particular subject (physics, in your case). If you don't have enough credits or zero credits, you won't be given admission into their institutions.
Hope this helps
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