Hello,

All of these test series that you have mentioned above are best.You just need to do more self study other than coaching institutes.

You can go for any of the test series depending upon your choice.I will suggest you to go for 1st one.

Good luck.

a proper study plan and strategy is very much required. You the strategy and path to crack the GATE exam 2018.

http://gate.iitg.ac.in/?page_id=59

http://nptel.ac.in/gate_paper.php

https://engineering.careers360.com/articles/how-to-prepare-for-gate