Guess that depends on what religion you believe....if any. If you're Christian, then it's Christian, if you're Muslim then it's Islam, if you're Jewish then it's Judaism, if you're Catholic then it's Catholicism.....so who's to say what's "right"? It seems no matter which one you "choose" it's all a form of control in one way or another....no thanks.
Since so many religious tout themselves as the " right " religion one can saftly conclude that all of them are wrong.
The one you connect with. Religion isn't a one size fits all. You have to find the one that speaks to you and go with that.
Seeing not one religion has evidence that it is the "correct" religion, it would be pretty much a choice of the person seeking a religion. Many state that they are the "only true religion" but they are as much the only true religion as the next group stating the same thing.
The "Right" religion depends on your predisposed worldview.
What ever your culture determines is that "right" religion and then indoctrinates their youth to believe this to be true, is what ultimately dictates what is "right" or not.
That is a subjective question.
But- for example- if one wishes to be a Christian, one needs to look beyond contemporary, popular organism and emotional inclination. And beyond national religious heritage.
First-century Judaic Christianity, for instance, was quite different than 4th-century Euro/Roman Gentile Christianity, which adopted Roman/Greek/Egyptian/Babylonian religious teachings, and melded them with Judaic teaching.
Protestants, who abandoned some of those formulations (including many superficial practices), retained almost all of the primary hybrid-developments of those Gentile religious teachings, even after restyling their form of organization.
But Jesus and his apostles, their disciples and the early Christians, however, were entirely Judaic, even after gentiles were permitted to penetrate and become a part of their congregations. ...after learning Judaic principles, of course.
This history is largely- and commonly- overlooked today, however. It is even widely dismissed. And "Christendom"- a European Gentile development- is often confused with "Christianity", which is intrinsically Judaic.
For example, notice the contrast on these two points:
Christianity: Non-political, non-commercial, no record of violence.
Christendom: Highly political, Highly commercial, a long, disturbing record of violence.
These two religions have vast differences, that produce vastly-different records of history.
If one decides to make a choice on what religion they wish to pursue, one also needs to look beyond heritage and contemporary majority, and investigate which is the "right"- as the question puts it- religion. Then validity can certainly be addressed.
For believers, perhaps the nearest you'll get to the "true" relgion comes in a quote from Hinduism's Rig Veda. "By whatever name you call me, it is I who will answer." It's something like buying home brands at the supermarket rather than the more expensive labels.
For the rest of us, religion is of no consequence.
I'm just taking it each day as it comes.
When I'm well and better. I'm looking into a particular religion.