If we can determine that the Old Testament is reliable, what are the only two options left on our list of possible true world religions? Remember, only one world religion can be true since each has exclusive claims (claims that are unique to each world religion).

If we can determine that the Old Testament is reliable, the only two options left on our list of possible true world religions would be those of Christianity and Judaism.

Explanation:

Though there is an apparent contradiction found in the ideologies bore and preached by the two religions stated here, the old testament conveys the sides of both of these religions effectively as the true world religions. But as the religions themselves claim that each one of them is a true world religion, only one of them can be considered to be ultimately true.