Hey there

Your profile indicates that you are from Delhi. And I am  thinking you are talking about Delhi University admission. Delhi University and its most of the  affiliated colleges only consider the aggregate marks of 4 subjects. This is known as best four subjects marks. Economics, sociology, history & political science are one of the subjects which are considered in best four.

For more: https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.careers360.com/university/university-of-delhi-delhi/amp&ved=2ahUKEwiJ3O_j8u_zAhWJf30KHcMqAzcQFnoECAoQAQ&usg=AOvVaw0RSGPaojjngT7npmHS3qIK&ampcf=1