greetings,
you can do various UG amd PG courses at US in science by appearing for relevant entraces,
admissions is through antrances and merit.
foe UG, the candidate must appear for SAT, for pg, candidate must appear for GMAT/GRE.
pls refer to the following link for more information:
https://studyabroad.careers360.com/
hope this helps
good luck
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