Which engineering branch is better: ECE, MEC or CSE?

Maharishi don't go with which stream is better. Go with what you want do after studying B.Tech. You may take following considerations. If you like computer, want to build crazy application or something related to software go with Computer Science engineering. If you like playing with machines/motors

Since it totally depends on your interest,that in which discipline you want to get admission.all the streams are doing equally good and moreover their scopes are also equal.but its is suggested to go for some premier institute where emphasis is given not only on technical skills but also in practica

MEC is the best.