Which religion is truth based or a true religion?

None, evidently.

All of them in their own way have "truth" involved.

Christianity is truly deluded
Islam is truly evil
Scientology is truly insane

etc.

You can throw out any which ask for faith. Because if a religion is demonstrably true, faith isn't necessary anymore. Is it?

All religions think they're true.

Spiritual Satanist

Christianity, Maneesh.

Every religion which speaks about life, construction and most importantly LOVE. Each religion speaks about these things in their own way so ALL religions are based off of truth in some way shape or form.

Sanatan Dharma is real. (Hindu Religion) is true religion.

What is interesting is why you want to know? your question kind of suggests you feel there is one true religion, why is that?
How much study have you made into the various forms of religion already?

A true religion is your internal commitment to acceptance all religion and know that that they are all following really one God. True religion will not and cannot separate people. A false religion will allow its members to hate every other people or religions. Love is the true religion. They all have a piece of the truth and to know that you have to study different religions.