How much CGPA one must score in IIT (BHU) to change branch from mining to mechanical?

The first semester at IIT BHU Mining branch has 6 subjects. All the students are required to get A/A* grades in all 4 Institute Courses sparing ED and ManuPrac. 

• Students willing to get into CSE should have CGPA >=9.80 for CSE.
• For those interested in changing their branch to Mechanical, anywhere a CGPA of 9.2 is preferable. One must be among the top 9 students of their batch.
• For branch change to Electrical, a CGPA>=9.6 is preferable given that you don’t have more than one A- in Institute Courses.

While filling out the branch change form, no one selects Metallurgy as an option so branch change to Metallurgy is very easy and you just need to be among the top 9.