Hi Ishika,
It takes 4 years to complete Medical school in the US following which there is a 3 to 7 year residency programme for training. To be eligible, you need a 4 year bachelors degree with subjects including biology, general chemistry, and organic chemistry. You have to appear for MCAT which is the medical entrance exam in usa. This link should be of help
https://studyabroad.careers360.com/exams/mcat
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