Student_dt = [ [72, 85, 87, 90, 69], [80, 87, 65, 89, 85], [96, 91, 70, 78, 97], [90, 93, 91, 90, 94], [57, 89, 82, 69, 60] ]  
#print(student_dt[])  
print(Student_dt[1]) # print all elements of index 1  
print(Student_dt[0]) # print all elements of index 0  
print(Student_dt[2]) # print all elements of index 2  
print(Student_dt[3][4]) # it defines the 3rd index and 4 position of the data element.