Hello,

RIT Kottayam has good placement reviews and many students has shared their experience. You can check it here:- https://www.careers360.com/colleges/rajiv-gandhi-institute-of-technology-kottayam

MA Kothamangalam has quite better reviews and rating than RIT Kottayam. You can check their reviews here :- https://www.careers360.com/colleges/mar-athanasius-college-of-engineering-kothamangalam

GEC Palakkad has same reviews as RIT Kottayam. As per placement basis it will be better to join MA Kothamangalam.

Rest is your choice!

Hope it helps!