Hello shubham, 

It would be difficult to tell about the branch you will get, as this year the paper pattern for manipal has changed and everyone is in dilemma because of it. The rank is based on the number of students appeared and their performance. It would be difficult to say anything about your rank but you may get a rank between 18k to 39k. With this rank you can expect ECE, MECHANICAL, CIVIL AND EEE in sikkim manipal. Still this is not accurate and may have error.

I would recommend you to wait for the official announcement of the rank and then i will finalise the branch.

All the best