What is the procedure and eligiblity criteria for admission at harvard and oxford university after 10+2?

Hi Fahad, in addition to the links given to you by Surya, I would like to add that to enter into Oxford you need to apply through UCAS by Oct 15 of the preceding year for admission. the minimum percentage that one should have is 90% be it HArvard or Oxford. To enter into Harvard you will also need

for oxford, check out http://www.ox.ac.uk/admissions/undergraduate_courses/courses/courses_and_entrance_requirements/index.html for harvard, check out http://www.admissions.college.harvard.edu/index.html

for admission at harvard and oxford university after 10+2 u need to complete 10+2 with 80% and start preparing for entrance exams now.