how mark need if I want to read geography
Admission is given on the basis of percentage which is calculated from your marks. 12th admission is given on the basis of 10th percentage. You can pursue higher degree in geography through UG and PG courses and go for research field. You can do BA, BSc in geography for UG course.
Some institutes gives admission on the basis of 12th percentage where as some conducts screening rounds to select students.
Hope it helps!