How can I root my ls-4505 (LYF flame8) android 6.0.1 marshmallow

I have tried a lot to root my ls-4505 running on android marshmallow but I am unsuccessful all time. Can anyone help me out? I've tried all one-click roots, I tried using psneuter via ADB but when i gave the command' ./psneuter '
it said *Incorrect command*

Plz help me, I will really appreciate it.

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